Suggestion about colors

[CarRepairer]

will it hurt your brian more hten when htere are 4 players with only very slightly different pinks?

No more or less.

Like I said, 6 shapes * 4 colors = 24 pairs, more than enough. Also it's much simpler to create a widget this way, just draw some png shapes filled in white and draw them on the ground using the appropriate colors. This would be much more complicated with multicolored shapes (or you'd have to draw each color+shape combo and add it to the game, big bloat).

[Jazcash]

If you applied patterns/textures to each icon of a similar colour, it could work work quite well.

If you had coloured backgrounds, you could extend that even more. You could possibly even fiddle around with transparency to create separate colours.

All these patterns below spring from the same colour. This allows loads of different options from 1 colour.