Disease icon readability

[Tharn]

Hi, big fan of your mods.

I noticed that when colonists come down with the flu or other diseases, the little icon that shows disease progress is yellow, and immunity color is white. These are really hard to tell apart. I'm suggesting these should be a different color. Something dark. Brown maybe?

The other color seen here is toxic buildup, which is fine as a lighter color since it can't be treated anyway.

[FluffierThanThou]

I switched to using the colors that are also used in text parts of the UI, but only for the 'foreground' color. I can see that that was probably not the brightest (pun intended) solution, I'll see about some alternatives. It should be straightforward to generate a high-contrast background color on the fly, or choose one from a some alternatives.