UI Colors - Visibility

[Necktschnagge]

As reported by @r0ost3r et al. the blue duck is a little too dark. The blue target cell is so dark so that it becomes hard to see the walls correctly. Even the thin grid looks like melting together with the cell's color.

Try one or more of the following solutions:

• Don't paint the whole target cell in the target color, instead:
  • add a padding which is colored like the background
  • add a specific cell marker for target cells (like a ball, a star)
• use a color gradient, paint the whole cell, where the center dot is the original color, use color gradient to white or background color when moving to the cell's edges.
• Change the dark colors to some brighter ones

[Necktschnagge]

4 colors suggested by rooster, afaik:

red #f4191c
yellow #ffbd02
green #00a340
blue    #4285f4