hmmm ... good point. I currently do have the buttons, and they all look good, but I was planning on buying some clear plungers for these, swapping all the colored plungers our with clear ones, and the cutting a circle the exact (or very close) color as the happ button (Red, blue, green & yellow). The circle inserts would go in the top of the clear plunger.
Why the hell do all this? Well, I've seen some cool "halo button" projects with LED lighting and I thought this might provide a similar effect? So, my first step was to try and figure out how to color match the buttons and get materials similar color and shine that I can cut circles out of.
EDIT: Now that I think about it, printing or vinyl cut outs won't work on the concave buttons, it'll have to be paint ... very very carefully applied. hmmm ... maybe too much work ... I don't know.