Just got mine. It's amazing how small the difference should be with color covers... and yet how much better it feels to have color covers, and the icons for the interface being something other than grey.
There's a picture of the Clara Colour without backlight on from the subreddit, and I think it'll prove true for me too when I get a chance to try it.
https://www.reddit.com/gallery/1cfzj0y
The rainbow effect of the color filter is noticeable if you look closely (it'll be a bit like someone put a film over it), but the text still looks sharp to me. Sharper than my Forma for sure, and as sharp as the Sage, although the contrast in sunlight I need to check later.