Please post what you did to color it.
I did a blue in my electric oven on broil, it just became a more metallic lighter blue.
Picture (Black, Gray, Baked Blue)
Then I did a Gray in my electric oven on broil, it removed all the blue coloring from the gray light (Gray convoy S2+'s are slightly blue)
Picture (Gray, and Baked Gray)
I was kind of hoping the gray would turn that nice tan color I have seen others change to like this picture here: