I’m running the new RC with the default light display scheme. My opinion is that there is insufficient contrast between the menu and tab text and the background. My monitor is a 28" 4K and Rhino is about 70-85% of the screen most of the time. I haven’t checked what the default color for that text is because I’m not sure I could find the setting in a reasonable amount of time. I think it’s a gray and could easily be 100% black. I don’t think I would appreciate the text being any bolder; I just think its a color/contrast issue.
I’n not sure to which colors you are referring, these?
To me that looks fine. There were some issues with too light colors but that got fixed a while back. If you see different colors, you might need to reset this color back to default
Rhino.UI.ThemeSettings.Frame.Tab.Unchecked.Text