Colour options for 'Scale'

Quite a simple and obvious request but would make a world of difference. Can we choose the colour for the scale icons?


Currently each one comes with a set colour but having the choice would be great. For example I could have multiple columns using the same Scale symbol, but with different colours to help separate them visually.



Or else: can we have colours only that are good to read for colour blind people?

Related: when I’m printing the doc to pdf, the ‘empty’ icons are quite dark, and there’s very little difference with for instance the blue diamond icon.