This is driving me nuts because it seems like such a simple thing to do. I've got a picture of a primed fiberglass door and want to try different colors, while keeping the slight amount of detail in the door frame, etc. I have a specific color swatch that I'd like to use (rather than adjusting hue/sat to achieve it) but all the common techniques I've tried either just slightly change the color from white to pink, or go gray. How does one change the color of an object that is white, while retaining detail?