The rail signal indicators for where you can place them next to the tracks are VERY hard to see for me. They are a dark-ish green color and really blend in with most of the tilesets on Nauvis. Is there a setting that allows changing the color?

Hmm... yeah, the green indicators on the green grass, also highlighted by the green construction zone field, don’t look very contrasty.
Okay, my mistake. I place rail signal almost intuitively now and don’t really pay attention to the indicators.
Should I make the indicators more contrasty or add color adjustment?
Or both?

I think both would certainly be ideal, defaulting to a color with more contrast. Perhaps an opacity setting as well?

In patch 1.1.5, I increased the brightness of the indicators. Is that enough?
Or would a setting to change the color and transparency be preferable?
I wouldn't want to add too many settings for ALL possible UI elements.

So far it looks good with the brighter indicators, I have had no difficulty seeing them after the change.