Glass Paint?

I have installed a set of those all-the-rage-among-the-kids indiglo gage faces on the Miata. Got them to sort of go with the blue face of the new in-dash MP3 Player. The dash used to have green backlighting and all that is left of it is the light shining on the ODOs. Decided to make it blue to match. Pulled the dash apart and popped out the bulbs. Removed the green plastic condoms and exposed the bare bulbs. Started to apply the blue glass paint I had bought this afternoon. Didn’t stick too well, but I kept at it. Two coats later it was time to put them back in and try it out. They lit up sort of blue. SH$T. Pulled the dash apart again. Fortunately because the paint didn’t stick too well it was relatively easy to remove. Put the bare bulbs in and now I have white light illuminating the ODO which is better than the green stock or aqua painted.