Colors of map and other charts / diagrams

[dospolov]

Mostly all charts follow an obvious pattern: more saturated color means biggest percentage.

But this not like that on maps:

It's not transparent from the first glance, because you have 3 different colors and you should map it somehow to percentage value in your head; or look on legend all the time.

I suggest using the same schema: grey to red with different saturation levels.