Requested many times. The developers once mentioned that this is possible, then no word about that anymore…
Here is what I think will suit everyone’s taste:
Rhino 9 UI cheme options to include 3 icon styles:
A. Classic V7 (thin outlines, white accents);
B. Classic V8 (thick outlines, gray accents);
C. Modern V9 (washed-out pastel colours, experimenting with lime green, add eye strain to colour-blind people just for fun).