I find the fully-colored LCD hard to read when it's entirely colored the color of that Stomp/Effects group, some more than others.
My suggestion: instead of coloring the entire LCD background red, purple, whatever, just color an outside border, like a picture frame, with that color, leaving the rest of the display the same color as the top-level screens.
This would make the LCD so much easier to read when editing Stops/Effects!!
-- jdm