As explained in the description, this collection comes with my own UI mod, Stitched Together UI (named HPUI.mod in the .cfg)

It is responsible for all the UI changes, big or small color or not. You can remove it and use any other UI mod instead.
You can also edit the mod itself at "SteamLibrary\steamapps\workshop\content\233860\3210016169\gui\colours\kenshi_colours.xml" to alter the colors yourself.

I guess I should've mentioned, the first thing I did was remove your custom UI mod. Great mod there was just a few things I didn't like. After, I installed Transparent UI its what I always use. I still have this issue, in game font black or dark red. I've played for several hours this way so I'm getting used to it, I've tried removing all UI mods and different ones and the issue persist. I'm not familiar with modding in any capacity but if it bothers me enough I'll figure out how to manually edit font colors.

I solved the issue. I was putting Transparent UI near the top of the load order under the UI graphics performance tab. After reading the description on your UI mod I noticed you advised it be near the bottom of the load order with font redux directly following. I did just that and voila its fixed. Anyways thanks for the help and this phenomenal modpack :)

Great to know you solved it ^^

Indeed UI mods should always be near the bottom to ensure they aren't overwritten by anything.