UI: add icon color coding for different data types in the outliner.

For now we have categories collection, object, object data, modifiers &
constraints, and shading. The icons can be categorized by adding e.g.
DEF_ICON_OBJECT() in UI_icons.h.

Light themes will need to be updated to use darker colors to keep icons
visible in the outliner.

release/datafiles/userdef/userdef_default_theme.c

@@ -244,6 +244,11 @@ const bTheme U_theme_default = {
 		.gizmo_secondary = RGBA(0x63ffffff),
 		.gizmo_a = RGBA(0x4da84dff),
 		.gizmo_b = RGBA(0xa33535ff),
+		.icon_collection = RGBA(0xccccccff),
+		.icon_object = RGBA(0xcc986eff),
+		.icon_object_data = RGBA(0x98cc98ff),
+		.icon_modifier = RGBA(0x6e98ccff),
+		.icon_shading = RGBA(0xcc6e6eff),
 	},
 	.tbuts = {
 		.back = RGBA(0x42424200),

release/scripts/startup/bl_ui/space_userpref.py

@@ -819,6 +819,30 @@ class USERPREF_PT_theme(Panel):
 
             col.separator()
             col.separator()
+
+            col.label(text="Icon Colors:")
+
+            row = col.row()
+
+            subsplit = row.split(factor=0.95)
+
+            padding = subsplit.split(factor=0.15)
+            colsub = padding.column()
+            colsub = padding.column()
+            colsub.row().prop(ui, "icon_collection")
+            colsub.row().prop(ui, "icon_object")
+            colsub.row().prop(ui, "icon_object_data")
+
+            subsplit = row.split(factor=0.85)
+
+            padding = subsplit.split(factor=0.15)
+            colsub = padding.column()
+            colsub = padding.column()
+            colsub.row().prop(ui, "icon_modifier")
+            colsub.row().prop(ui, "icon_shading")
+
+            col.separator()
+            col.separator()
         elif theme.theme_area == 'BONE_COLOR_SETS':
             col = split.column()
 

source/blender/blenkernel/BKE_blender_version.h

@@ -28,7 +28,7 @@
  * and keep comment above the defines.
  * Use STRINGIFY() rather than defining with quotes */
 #define BLENDER_VERSION         280
-#define BLENDER_SUBVERSION      25
+#define BLENDER_SUBVERSION      26
 /* Several breakages with 280, e.g. collections vs layers */
 #define BLENDER_MINVERSION      280
 #define BLENDER_MINSUBVERSION   0

source/blender/blenloader/intern/versioning_userdef.c

@@ -57,6 +57,14 @@ static void do_versions_theme(UserDef *userdef, bTheme *btheme)
 		copy_v4_v4_char(btheme->tnla.anim_preview_range, btheme->tnla.anim_active);
 		copy_v4_v4_char(btheme->tipo.anim_preview_range, btheme->tact.anim_active);
 	}
+
+	if (!USER_VERSION_ATLEAST(280, 26)) {
+		copy_v4_v4_char(btheme->tui.icon_collection, U_theme_default.tui.icon_collection);
+		copy_v4_v4_char(btheme->tui.icon_object, U_theme_default.tui.icon_object);
+		copy_v4_v4_char(btheme->tui.icon_object_data, U_theme_default.tui.icon_object_data);
+		copy_v4_v4_char(btheme->tui.icon_modifier, U_theme_default.tui.icon_modifier);
+		copy_v4_v4_char(btheme->tui.icon_shading, U_theme_default.tui.icon_shading);
+	}
 #undef USER_VERSION_ATLEAST
 
 }

source/blender/editors/include/UI_icons.h

@@ -30,6 +30,26 @@
 
 /* Note: this is included multiple times with different #defines for DEF_ICON. */
 
+/* Auto define more specific types for places that do not need the distinction. */
+#ifndef DEF_ICON_COLLECTION
+  #define DEF_ICON_COLLECTION DEF_ICON
+#endif
+#ifndef DEF_ICON_OBJECT
+  #define DEF_ICON_OBJECT DEF_ICON
+#endif
+#ifndef DEF_ICON_OBJECT_DATA
+  #define DEF_ICON_OBJECT_DATA DEF_ICON
+#endif
+#ifndef DEF_ICON_MODIFIER
+  #define DEF_ICON_MODIFIER DEF_ICON
+#endif
+#ifndef DEF_ICON_SHADING
+  #define DEF_ICON_SHADING DEF_ICON
+#endif
+#ifndef DEF_ICON_COLOR
+  #define DEF_ICON_COLOR DEF_ICON
+#endif
+
 /* ICON_ prefix added */
 DEF_ICON_COLOR(NONE)
 DEF_ICON(QUESTION)
@@ -115,17 +135,17 @@ DEF_ICON(FULLSCREEN_EXIT)
 DEF_ICON(ONIONSKIN)
 
 	/* BUTTONS */
-DEF_ICON(LIGHT)
+DEF_ICON_SHADING(LIGHT)
-DEF_ICON(MATERIAL)
+DEF_ICON_SHADING(MATERIAL)
-DEF_ICON(TEXTURE)
+DEF_ICON_SHADING(TEXTURE)
 DEF_ICON(ANIM)
-DEF_ICON(WORLD)
+DEF_ICON_SHADING(WORLD)
 DEF_ICON(SCENE)
 DEF_ICON(EDIT)
 DEF_ICON(GAME)
 DEF_ICON(RADIO)
 DEF_ICON_COLOR(SCRIPT)
-DEF_ICON(PARTICLES)
+DEF_ICON_MODIFIER(PARTICLES)
 DEF_ICON(PHYSICS)
 DEF_ICON(SPEAKER)
 DEF_ICON(TEXTURE_SHADED)
@@ -200,34 +220,34 @@ DEF_ICON_BLANK(77b)
 	/* DATA */
 DEF_ICON(SCENE_DATA)
 DEF_ICON(RENDERLAYERS)
-DEF_ICON(WORLD_DATA)
+DEF_ICON_SHADING(WORLD_DATA)
 DEF_ICON(OBJECT_DATA)
 DEF_ICON(MESH_DATA)
 DEF_ICON(CURVE_DATA)
 DEF_ICON(META_DATA)
 DEF_ICON(LATTICE_DATA)
-DEF_ICON(LIGHT_DATA)
+DEF_ICON_SHADING(LIGHT_DATA)
-DEF_ICON(MATERIAL_DATA)
+DEF_ICON_SHADING(MATERIAL_DATA)
-DEF_ICON(TEXTURE_DATA)
+DEF_ICON_SHADING(TEXTURE_DATA)
 DEF_ICON(ANIM_DATA)
 DEF_ICON(CAMERA_DATA)
 DEF_ICON(PARTICLE_DATA)
 DEF_ICON(LIBRARY_DATA_DIRECT)
-DEF_ICON(GROUP)
+DEF_ICON_COLLECTION(GROUP)
 DEF_ICON(ARMATURE_DATA)
 DEF_ICON(POSE_DATA)
 DEF_ICON(BONE_DATA)
-DEF_ICON(CONSTRAINT)
+DEF_ICON_MODIFIER(CONSTRAINT)
 DEF_ICON_COLOR(SHAPEKEY_DATA)
-DEF_ICON(CONSTRAINT_BONE)
+DEF_ICON_MODIFIER(CONSTRAINT_BONE)
 DEF_ICON(CAMERA_STEREO)
 DEF_ICON(PACKAGE)
 DEF_ICON(UGLYPACKAGE)
 DEF_ICON_BLANK(79b)
 
 	/* DATA */
-DEF_ICON(BRUSH_DATA)
+DEF_ICON_SHADING(BRUSH_DATA)
-DEF_ICON(IMAGE_DATA)
+DEF_ICON_SHADING(IMAGE_DATA)
 DEF_ICON(FILE)
 DEF_ICON(FCURVE)
 DEF_ICON(FONT_DATA)
@@ -242,7 +262,7 @@ DEF_ICON_COLOR(BOIDS)
 DEF_ICON(STRANDS)
 DEF_ICON(LIBRARY_DATA_INDIRECT)
 DEF_ICON(GREASEPENCIL)
-DEF_ICON(LINE_DATA)
+DEF_ICON_SHADING(LINE_DATA)
 DEF_ICON_COLOR(LIBRARY_DATA_OVERRIDE)
 DEF_ICON(GROUP_BONE)
 DEF_ICON(GROUP_VERTEX)
@@ -282,22 +302,22 @@ DEF_ICON(SYSTEM)
 DEF_ICON(SETTINGS)
 
 	/* OUTLINER */
-DEF_ICON(OUTLINER_OB_EMPTY)
+DEF_ICON_OBJECT(OUTLINER_OB_EMPTY)
-DEF_ICON(OUTLINER_OB_MESH)
+DEF_ICON_OBJECT(OUTLINER_OB_MESH)
-DEF_ICON(OUTLINER_OB_CURVE)
+DEF_ICON_OBJECT(OUTLINER_OB_CURVE)
-DEF_ICON(OUTLINER_OB_LATTICE)
+DEF_ICON_OBJECT(OUTLINER_OB_LATTICE)
-DEF_ICON(OUTLINER_OB_META)
+DEF_ICON_OBJECT(OUTLINER_OB_META)
-DEF_ICON(OUTLINER_OB_LIGHT)
+DEF_ICON_OBJECT(OUTLINER_OB_LIGHT)
-DEF_ICON(OUTLINER_OB_CAMERA)
+DEF_ICON_OBJECT(OUTLINER_OB_CAMERA)
-DEF_ICON(OUTLINER_OB_ARMATURE)
+DEF_ICON_OBJECT(OUTLINER_OB_ARMATURE)
-DEF_ICON(OUTLINER_OB_FONT)
+DEF_ICON_OBJECT(OUTLINER_OB_FONT)
-DEF_ICON(OUTLINER_OB_SURFACE)
+DEF_ICON_OBJECT(OUTLINER_OB_SURFACE)
-DEF_ICON(OUTLINER_OB_SPEAKER)
+DEF_ICON_OBJECT(OUTLINER_OB_SPEAKER)
-DEF_ICON(OUTLINER_OB_FORCE_FIELD)
+DEF_ICON_OBJECT(OUTLINER_OB_FORCE_FIELD)
-DEF_ICON(OUTLINER_OB_GROUP_INSTANCE)
+DEF_ICON_OBJECT(OUTLINER_OB_GROUP_INSTANCE)
-DEF_ICON(OUTLINER_OB_GREASEPENCIL)
+DEF_ICON_OBJECT(OUTLINER_OB_GREASEPENCIL)
-DEF_ICON(OUTLINER_OB_LIGHTPROBE)
+DEF_ICON_OBJECT(OUTLINER_OB_LIGHTPROBE)
-DEF_ICON(OUTLINER_OB_IMAGE)
+DEF_ICON_OBJECT(OUTLINER_OB_IMAGE)
 DEF_ICON_BLANK(125)
 DEF_ICON(RESTRICT_COLOR_OFF)
 DEF_ICON(RESTRICT_COLOR_ON)
@@ -311,19 +331,19 @@ DEF_ICON_BLANK(127b)
 
 	/* OUTLINER */
 DEF_ICON_BLANK(128)
-DEF_ICON(OUTLINER_DATA_MESH)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_MESH)
-DEF_ICON(OUTLINER_DATA_CURVE)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_CURVE)
-DEF_ICON(OUTLINER_DATA_LATTICE)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_LATTICE)
-DEF_ICON(OUTLINER_DATA_META)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_META)
-DEF_ICON(OUTLINER_DATA_LIGHT)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_LIGHT)
-DEF_ICON(OUTLINER_DATA_CAMERA)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_CAMERA)
-DEF_ICON(OUTLINER_DATA_ARMATURE)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_ARMATURE)
-DEF_ICON(OUTLINER_DATA_FONT)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_FONT)
-DEF_ICON(OUTLINER_DATA_SURFACE)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_SURFACE)
-DEF_ICON(OUTLINER_DATA_SPEAKER)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_SPEAKER)
-DEF_ICON(OUTLINER_DATA_POSE)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_POSE)
 DEF_ICON_BLANK(130)
-DEF_ICON(OUTLINER_DATA_GREASEPENCIL)
+DEF_ICON_OBJECT_DATA(OUTLINER_DATA_GREASEPENCIL)
 DEF_ICON_BLANK(132)
 DEF_ICON_BLANK(133)
 DEF_ICON_BLANK(134)
@@ -350,11 +370,11 @@ DEF_ICON(MESH_TORUS)
 DEF_ICON(MESH_CONE)
 DEF_ICON(MESH_CAPSULE)
 DEF_ICON_BLANK(611)
-DEF_ICON(LIGHT_POINT)
+DEF_ICON_SHADING(LIGHT_POINT)
-DEF_ICON(LIGHT_SUN)
+DEF_ICON_SHADING(LIGHT_SUN)
-DEF_ICON(LIGHT_SPOT)
+DEF_ICON_SHADING(LIGHT_SPOT)
-DEF_ICON(LIGHT_HEMI)
+DEF_ICON_SHADING(LIGHT_HEMI)
-DEF_ICON(LIGHT_AREA)
+DEF_ICON_SHADING(LIGHT_AREA)
 DEF_ICON_BLANK(617)
 DEF_ICON_BLANK(618)
 DEF_ICON_COLOR(META_EMPTY)
@@ -380,9 +400,9 @@ DEF_ICON(CURVE_BEZCIRCLE)
 DEF_ICON(CURVE_NCURVE)
 DEF_ICON(CURVE_NCIRCLE)
 DEF_ICON(CURVE_PATH)
-DEF_ICON(LIGHTPROBE_CUBEMAP)
+DEF_ICON_SHADING(LIGHTPROBE_CUBEMAP)
-DEF_ICON(LIGHTPROBE_PLANAR)
+DEF_ICON_SHADING(LIGHTPROBE_PLANAR)
-DEF_ICON(LIGHTPROBE_GRID)
+DEF_ICON_SHADING(LIGHTPROBE_GRID)
 DEF_ICON_BLANK(647)
 DEF_ICON_BLANK(648)
 DEF_ICON(COLOR_RED)
@@ -506,7 +526,7 @@ DEF_ICON_BLANK(784)
 DEF_ICON_BLANK(785)
 
 	/* MODIFIERS */
-DEF_ICON(MODIFIER)
+DEF_ICON_MODIFIER(MODIFIER)
 DEF_ICON_COLOR(MOD_WAVE)
 DEF_ICON_COLOR(MOD_BUILD)
 DEF_ICON_COLOR(MOD_DECIM)
@@ -1034,3 +1054,15 @@ DEF_ICON_COLOR(EVENT_HOME)
 DEF_ICON_COLOR(EVENT_END)
 DEF_ICON_COLOR(EVENT_RETURN)
 /* add as needed. */
+
+/* Undefine all types. */
+
+#undef DEF_ICON
+#undef DEF_ICON_COLLECTION
+#undef DEF_ICON_OBJECT
+#undef DEF_ICON_OBJECT_DATA
+#undef DEF_ICON_MODIFIER
+#undef DEF_ICON_SHADING
+#undef DEF_ICON_VECTOR
+#undef DEF_ICON_COLOR
+#undef DEF_ICON_BLANK

source/blender/editors/include/UI_resources.h

@@ -29,11 +29,12 @@
  *  \ingroup editorui
  */
 
+#include "BLI_sys_types.h"
+
 #ifndef __UI_RESOURCES_H__
 #define __UI_RESOURCES_H__
 
-/* elubie: TODO: move the typedef for icons to UI_interface_icons.h */
+/* Define icon enum. */
-/* and add/replace include of UI_resources.h by UI_interface_icons.h */
 #define DEF_ICON(name) ICON_##name,
 #define DEF_ICON_VECTOR(name) ICON_##name,
 #define DEF_ICON_COLOR(name) ICON_##name,
@@ -47,11 +48,6 @@ typedef enum {
 
 #define BIFICONID_FIRST  (ICON_NONE)
 
-#undef DEF_ICON
-#undef DEF_ICON_VECTOR
-#undef DEF_ICON_COLOR
-#undef DEF_ICON_BLANK
-
 /* use to denote intentionally unset theme color */
 #define TH_UNDEFINED -1
 
@@ -267,6 +263,12 @@ typedef enum ThemeColorID {
 	TH_ANIM_INACTIVE, /* no active action */
 	TH_ANIM_PREVIEW_RANGE,/* preview range overlay */
 
+	TH_ICON_COLLECTION,
+	TH_ICON_OBJECT,
+	TH_ICON_OBJECT_DATA,
+	TH_ICON_MODIFIER,
+	TH_ICON_SHADING,
+
 	TH_NLA_TWEAK,        /* 'tweaking' track in NLA */
 	TH_NLA_TWEAK_DUPLI,  /* error/warning flag for other strips referencing dupli strip */
 
@@ -366,6 +368,9 @@ void UI_GetThemeColor4ubv(int colorid, unsigned char col[4]);
 // get a theme color from specified space type
 void UI_GetThemeColorType4ubv(int colorid, int spacetype, char col[4]);
 
+// get theme color for coloring monochrome icons
+bool    UI_GetIconThemeColor4fv(int colorid, float col[4]);
+
 // shade a 3 byte color (same as UI_GetColorPtrBlendShade3ubv with 0.0 factor)
 void    UI_GetColorPtrShade3ubv(const unsigned char cp1[3], unsigned char col[3], int offset);
 

source/blender/editors/interface/interface_icons.c

@@ -129,6 +129,7 @@ typedef struct DrawInfo {
 		} buffer;
 		struct {
 			int x, y, w, h;
+			int theme_color;
 		} texture;
 		struct {
 			/* Can be packed into a single int. */
@@ -149,29 +150,35 @@ typedef struct IconTexture {
 	float invh;
 } IconTexture;
 
+typedef struct IconType {
+	int type;
+	int theme_color;
+} IconType;
+
 /* ******************* STATIC LOCAL VARS ******************* */
 /* static here to cache results of icon directory scan, so it's not
  * scanning the filesystem each time the menu is drawn */
 static struct ListBase iconfilelist = {NULL, NULL};
 static IconTexture icongltex = {0, 0, 0, 0.0f, 0.0f};
 
-static const int icontypes[] = {
+static const IconType icontypes[] = {
-#define DEF_ICON(name) ICON_TYPE_MONO_TEXTURE,
+#define DEF_ICON(name) {ICON_TYPE_MONO_TEXTURE, 0},
-#define DEF_ICON_VECTOR(name) ICON_TYPE_VECTOR,
+#define DEF_ICON_COLLECTION(name) {ICON_TYPE_MONO_TEXTURE, TH_ICON_COLLECTION},
-#define DEF_ICON_COLOR(name) ICON_TYPE_COLOR_TEXTURE,
+#define DEF_ICON_OBJECT(name) {ICON_TYPE_MONO_TEXTURE, TH_ICON_OBJECT},
-#define DEF_ICON_BLANK(name) ICON_TYPE_BLANK,
+#define DEF_ICON_OBJECT_DATA(name) {ICON_TYPE_MONO_TEXTURE, TH_ICON_OBJECT_DATA},
+#define DEF_ICON_MODIFIER(name) {ICON_TYPE_MONO_TEXTURE, TH_ICON_MODIFIER},
+#define DEF_ICON_SHADING(name) {ICON_TYPE_MONO_TEXTURE, TH_ICON_SHADING},
+#define DEF_ICON_VECTOR(name) {ICON_TYPE_VECTOR, 0},
+#define DEF_ICON_COLOR(name) {ICON_TYPE_COLOR_TEXTURE, 0},
+#define DEF_ICON_BLANK(name) {ICON_TYPE_BLANK, 0},
 #include "UI_icons.h"
-#undef DEF_ICON
-#undef DEF_ICON_VECTOR
-#undef DEF_ICON_COLOR
-#undef DEF_ICON_BLANK
 };
 
 /* **************************************************** */
 
 #ifndef WITH_HEADLESS
 
-static DrawInfo *def_internal_icon(ImBuf *bbuf, int icon_id, int xofs, int yofs, int size, int type)
+static DrawInfo *def_internal_icon(ImBuf *bbuf, int icon_id, int xofs, int yofs, int size, int type, int theme_color)
 {
 	Icon *new_icon = NULL;
 	IconImage *iimg = NULL;
@@ -186,6 +193,7 @@ static DrawInfo *def_internal_icon(ImBuf *bbuf, int icon_id, int xofs, int yofs,
 	di->type = type;
 
 	if (ELEM(type, ICON_TYPE_COLOR_TEXTURE, ICON_TYPE_MONO_TEXTURE)) {
+		di->data.texture.theme_color = theme_color;
 		di->data.texture.x = xofs;
 		di->data.texture.y = yofs;
 		di->data.texture.w = size;
@@ -439,7 +447,7 @@ static void init_brush_icons(void)
 		int size = datatoc_ ##name## _png_size;                                 \
 		DrawInfo *di;                                                           \
 		\
-		di = def_internal_icon(NULL, icon_id, 0, 0, w, ICON_TYPE_BUFFER);       \
+		di = def_internal_icon(NULL, icon_id, 0, 0, w, ICON_TYPE_BUFFER, 0);    \
 		di->data.buffer.image->datatoc_rect = rect;                             \
 		di->data.buffer.image->datatoc_size = size;                             \
 	}
@@ -580,7 +588,7 @@ static void init_event_icons(void)
 
 #define INIT_EVENT_ICON(icon_id, type, value) \
 	{ \
-		DrawInfo *di = def_internal_icon(NULL, icon_id, 0, 0, w, ICON_TYPE_EVENT); \
+		DrawInfo *di = def_internal_icon(NULL, icon_id, 0, 0, w, ICON_TYPE_EVENT, 0); \
 		di->data.input.event_type = type; \
 		di->data.input.event_value = value; \
 		di->data.input.icon = icon_id; \
@@ -741,15 +749,15 @@ static void init_internal_icons(void)
 		for (y = 0; y < ICON_GRID_ROWS; y++) {
 			/* Row W has monochrome icons. */
 			for (x = 0; x < ICON_GRID_COLS; x++) {
-				int icontype = icontypes[y * ICON_GRID_COLS + x];
+				IconType icontype = icontypes[y * ICON_GRID_COLS + x];
-				if (!ELEM(icontype, ICON_TYPE_COLOR_TEXTURE, ICON_TYPE_MONO_TEXTURE)) {
+				if (!ELEM(icontype.type, ICON_TYPE_COLOR_TEXTURE, ICON_TYPE_MONO_TEXTURE)) {
 					continue;
 				}
 
 				def_internal_icon(b32buf, BIFICONID_FIRST + y * ICON_GRID_COLS + x,
 				                  x * (ICON_GRID_W + ICON_GRID_MARGIN) + ICON_GRID_MARGIN,
 				                  y * (ICON_GRID_H + ICON_GRID_MARGIN) + ICON_GRID_MARGIN, ICON_GRID_W,
-				                  icontype);
+				                  icontype.type, icontype.theme_color);
 			}
 		}
 	}
@@ -1528,11 +1536,13 @@ static void icon_draw_size(
 	else if (di->type == ICON_TYPE_MONO_TEXTURE) {
 		/* icon that matches text color, assumed to be white */
 		float color[4];
-		if (mono_rgba) {
+		if (!UI_GetIconThemeColor4fv(di->data.texture.theme_color, color)) {
-			rgba_uchar_to_float(color, (const uchar *)mono_rgba);
+			if (mono_rgba) {
-		}
+				rgba_uchar_to_float(color, (const uchar *)mono_rgba);
-		else {
+			}
-			UI_GetThemeColor4fv(TH_TEXT, color);
+			else {
+				UI_GetThemeColor4fv(TH_TEXT, color);
+			}
 		}
 
 		if (rgb) {

source/blender/editors/interface/resources.c

@@ -686,6 +686,17 @@ const unsigned char *UI_ThemeGetColorPtr(bTheme *btheme, int spacetype, int colo
 				case TH_GIZMO_B:
 					cp = btheme->tui.gizmo_b; break;
 
+				case TH_ICON_COLLECTION:
+					cp = btheme->tui.icon_collection; break;
+				case TH_ICON_OBJECT:
+					cp = btheme->tui.icon_object; break;
+				case TH_ICON_OBJECT_DATA:
+					cp = btheme->tui.icon_object_data; break;
+				case TH_ICON_MODIFIER:
+					cp = btheme->tui.icon_modifier; break;
+				case TH_ICON_SHADING:
+					cp = btheme->tui.icon_shading; break;
+
 				case TH_INFO_SELECTED:
 					cp = ts->info_selected;
 					break;
@@ -1109,6 +1120,31 @@ void UI_GetThemeColorType4ubv(int colorid, int spacetype, char col[4])
 	col[3] = cp[3];
 }
 
+bool UI_GetIconThemeColor4fv(int colorid, float col[4])
+{
+	if (colorid == 0) {
+		return false;
+	}
+
+	/* Only colored icons in outliner and popups, overall UI is intended
+	 * to stay monochrome and out of the way except a few places where it
+	 * is important to communicate different data types. */
+	if (!((theme_spacetype == SPACE_OUTLINER) ||
+	      (theme_regionid == RGN_TYPE_TEMPORARY)))
+	{
+		return false;
+	}
+
+	const unsigned char *cp;
+	cp = UI_ThemeGetColorPtr(theme_active, theme_spacetype, colorid);
+	col[0] = ((float)cp[0]) / 255.0f;
+	col[1] = ((float)cp[1]) / 255.0f;
+	col[2] = ((float)cp[2]) / 255.0f;
+	col[3] = ((float)cp[3]) / 255.0f;
+
+	return true;
+}
+
 void UI_GetColorPtrShade3ubv(const unsigned char cp[3], unsigned char col[3], int offset)
 {
 	int r, g, b;

source/blender/editors/space_outliner/outliner_draw.c

@@ -1426,7 +1426,7 @@ static void outliner_draw_iconrow_doit(
 
 	if (active != OL_DRAWSEL_NONE) {
 		float ufac = UI_UNIT_X / 20.0f;
-		float color[4] = {1.0f, 1.0f, 1.0f, 0.4f};
+		float color[4] = {1.0f, 1.0f, 1.0f, 0.2f};
 
 		UI_draw_roundbox_corner_set(UI_CNR_ALL);
 		color[3] *= alpha_fac;

source/blender/makesdna/DNA_userdef_types.h

@@ -200,7 +200,13 @@ typedef struct ThemeUI {
 	char gizmo_secondary[4];
 	char gizmo_a[4];
 	char gizmo_b[4];
-	char pad2[4];
+
+	/* Icon Colors. */
+	char icon_collection[4];  /* Collection items */
+	char icon_object[4];      /* Object items */
+	char icon_object_data[4]; /* Object data items */
+	char icon_modifier[4];    /* Modifier and constraint items */
+	char icon_shading[4];     /* Shading related items */
 } ThemeUI;
 
 /* try to put them all in one, if needed a special struct can be created as well

source/blender/makesrna/intern/rna_ui_api.c

@@ -55,10 +55,6 @@ const EnumPropertyItem rna_enum_icon_items[] = {
 #include "UI_icons.h"
 	{0, NULL, 0, NULL, NULL}
 };
-#undef DEF_ICON
-#undef DEF_ICON_VECTOR
-#undef DEF_ICON_COLOR
-#undef DEF_ICON_BLANK
 
 #ifdef RNA_RUNTIME
 

source/blender/makesrna/intern/rna_userdef.c

@@ -1229,6 +1229,37 @@ static void rna_def_userdef_theme_ui(BlenderRNA *brna)
 	RNA_def_property_array(prop, 3);
 	RNA_def_property_ui_text(prop, "Gizmo B", "");
 	RNA_def_property_update(prop, 0, "rna_userdef_update");
+
+	/* Icon colors. */
+	prop = RNA_def_property(srna, "icon_collection", PROP_FLOAT, PROP_COLOR_GAMMA);
+	RNA_def_property_float_sdna(prop, NULL, "icon_collection");
+	RNA_def_property_array(prop, 4);
+	RNA_def_property_ui_text(prop, "Collection", "");
+	RNA_def_property_update(prop, 0, "rna_userdef_update");
+
+	prop = RNA_def_property(srna, "icon_object", PROP_FLOAT, PROP_COLOR_GAMMA);
+	RNA_def_property_float_sdna(prop, NULL, "icon_object");
+	RNA_def_property_array(prop, 4);
+	RNA_def_property_ui_text(prop, "Object", "");
+	RNA_def_property_update(prop, 0, "rna_userdef_update");
+
+	prop = RNA_def_property(srna, "icon_object_data", PROP_FLOAT, PROP_COLOR_GAMMA);
+	RNA_def_property_float_sdna(prop, NULL, "icon_object_data");
+	RNA_def_property_array(prop, 4);
+	RNA_def_property_ui_text(prop, "Object Data", "");
+	RNA_def_property_update(prop, 0, "rna_userdef_update");
+
+	prop = RNA_def_property(srna, "icon_modifier", PROP_FLOAT, PROP_COLOR_GAMMA);
+	RNA_def_property_float_sdna(prop, NULL, "icon_modifier");
+	RNA_def_property_array(prop, 4);
+	RNA_def_property_ui_text(prop, "Modifier", "");
+	RNA_def_property_update(prop, 0, "rna_userdef_update");
+
+	prop = RNA_def_property(srna, "icon_shading", PROP_FLOAT, PROP_COLOR_GAMMA);
+	RNA_def_property_float_sdna(prop, NULL, "icon_shading");
+	RNA_def_property_array(prop, 4);
+	RNA_def_property_ui_text(prop, "Shading", "");
+	RNA_def_property_update(prop, 0, "rna_userdef_update");
 }
 
 static void rna_def_userdef_theme_space_common(StructRNA *srna)