As an addendum to what Brian is saying, I wanted to add this:
The buttons he cast for me are pretty much an exact match, color-wise, for the blue empeg lens. The plastic color is more or less identical.
It's only the light emitted from the electronic components that is different. So, when lit up, the buttons glow a "bluer" shade than the "greenish" VFD display.
I personally think it looks fantastic with the buttons glowing a deep blue and the VFD glowing a cyan hue. It's a nice contrast, but they match well. And it makes the player look like an across-the-board match when the sun shines on the face.