Sorry, I don’t get. You are looking for a direct way to pass float to an eve element and set the color through it? This doesn’t exist … you’ll either have to map them yourself, use TColor::GetColorPalette() as shown in the post you reference, or use TEveRGBAPalette which is sort of a wrapper around it (it has an option to interpolate between palette values). TEveDigitSet / QuadSet / BoxSet can work with the EveRGBAPalette directly, allowing you to fiddle with active range and cuts through GUI. See eve/tutorial/boxset.C.