Armature: Fix bone axes not using bone color.

source/blender/draw/intern/draw_armature.c

@@ -988,6 +988,7 @@ static void draw_axes(EditBone *eBone, bPoseChannel *pchan)
 	const float *col = (g_theme.const_color) ? g_theme.const_color :
 	                   (BONE_FLAG(eBone, pchan) & BONE_SELECTED) ? g_theme.text_hi_color : g_theme.text_color;
 	copy_v4_v4(final_col, col);
+	final_col[3] = (g_theme.const_color) ? 1.0 : 0.3; /* Mix with axes color. */
 	drw_shgroup_bone_axes(BONE_VAR(eBone, pchan, disp_mat), final_col);
 }
 

source/blender/draw/intern/draw_common.c

@@ -452,7 +452,7 @@ DRWShadingGroup *shgroup_instance_bone_axes(DRWPass *pass)
 
 	DRWShadingGroup *grp = DRW_shgroup_instance_create(g_shaders.bone_axes,
 	                                                   pass, DRW_cache_bone_arrows_get(),
-	                                                   g_formats.instance_bone_outline);
+	                                                   g_formats.instance_color);
 	DRW_shgroup_uniform_vec3(grp, "screenVecs[0]", DRW_viewport_screenvecs_get(), 2);
 
 	return grp;

source/blender/draw/modes/shaders/armature_axes_vert.glsl

@@ -9,7 +9,7 @@ in vec3 colorAxis;
 
 /* ---- Per instance Attribs ---- */
 in mat4 InstanceModelMatrix;
-in vec3 color;
+in vec4 color;
 
 flat out vec4 finalColor;
 
@@ -25,6 +25,6 @@ void main()
 	
 	gl_Position = ViewProjectionMatrix * vec4(wpos + spos, 1.0);
 
-	finalColor.rgb = mix(color, colorAxis, 0.9);
+	finalColor.rgb = mix(colorAxis, color.rgb, color.a);
 	finalColor.a = 1.0;
 }