-
Thicker outlines help to distinguish the icons easily, but the outlines of the Rhino V8 icons are way too thick. The outlines of V7 icons are nearly perfect, but I would make them something between V7 and V8 (thicker than the outlines of V7, but thinnner than V8);
-
High contrast square black dots with white center fill in V7 icons are better than the modern round dots with less contrasty center fill. While the round dots are more pleasing to the eye, the square ones are slightly ugly but far easier to distinguish;
-
Lime green in general is a risky colour, because many colour-blind people see it either as green, yellow, orange, pink, gray etc. When I check the lime green icons in a Paint program, I see their RGB code, however, my colour-blind vision works in a different way and I see those icons in all of the aforementioned colours, depending on the shade and intensity.
-
Gray accents in Rhino V8 icons that replaced the white accents in V7 don’t look good on slightly darker tab background colour other than white. As I use medium grey tab background, the V7 icons look considerably better than the V8 icons.