It would be nice to use plain text output with customizable text, font and color as in the Clock plugin! That would help a lot since the available skins are quite specific in shape, size and color selection.
Best,
MM
It is fairly easy to change the color of the digits at least. Open the skins folder C:\Program Files\TrueLaunchBar\plugins\uptime\skins\Digital White and then open the file called UTDigitEL.png in a graphics program like Paint and change the color of the digits from white to whatever you like. Save the file and reopen selecting the Digital White skin and there you go.