Foolproof until you get someone who is color blind, or the label gets peeled off
J
?
I¡¯ve had a couple projects where color (bonus points for picking from the palette of corporate identity colors) has been used as a secondary cue, e.g. ¡°Laptop
1¡± on a yellow button, ¡°Laptop 2¡± on a green button, ?etc. but leaving it just to color with no other means of identification is a bit risky.