No, but you can always have a second button in the color you want, containing no code, with the inverse hide formula of the active button. (or a graphic that looks like whatever you want and does nothing when clicked).
Before implementing one of the two suggestions, consider that:
A button with no code behind will still be "clickable’ but to the user, no apparent action will occur, leading to possible confusion and Helpdesk requests
A graphic that looks like a button will not be “clickable” (the button will not move down and up) but will not inherit the sysem color or other visual attributes for widgets and will not look the same across all platforms and may even differ from other buttons on the same platform depending on the user’s settings.