Color validator is rejecting most colors on the ~left half of the color chooser.

[pchote]

This is silly. If we really do mean to be rejecting this much of the color space, then the picker should be adjusted to not show this area of rejected colors.

[pchote]

This is a more serious regression than I initially thought.
We are rejecting between half and three quarters of all the available colors (black areas are rejected):

[pchote]

I have a branch that already fixes this, but I want to make it even better still before I PR it.

[pchote]

I am tacking this with a combination of changes:

• Reducing the extreme threshold values that were introduced in 621cdeb
• Only restricting colors that conflict with the main map colors (ground, water, resources) – turns out that the main problem were cliffs and roads!
• Removing the validation against noncombatant players like neutral that were wiping out the low saturation colors.
• Adding absolute S/L limits to chop off the deep greys and blacks (and trimming the color selection palette to match).

I've also increased the palette size to make colors easier to select: