Are there details that could be added for format-hex? For example, is the output really RGB in the format “RRGGBB”? If not, how are the values determined?
If it is RGB, a corresponding function to convert to color would probably be useful. For people who want a specific color, having to convert 0-255 to 0-1 is going to be a pain. You need to keep node to convert 0-1 range to color for those who want to use POTs or other built-ins to select color.