Is there any way to change the text size and color in the OUTLINER box? I find the grayed out text for hidden geometry to light to see making it difficult to find the hidden objects to unhide them. I work with multiple scenes and work a lot with hidden geometry.
No, those are not exposed as user-settable preferences. You could submit a Feature Request and see whether it gets any priority from Trimble, but my guess is that they have bigger issues they need to address first.
On Windows editions, some of the settings are system based.