The famous yellow/green glow is from uranium, of course.
But other chemicals can do other colors. I'm hesitant to say much because I stumble over the chemical names and the oxides, but I remember calcium being involved somehow in an eery blue glow that I quite enjoy. I have seen it in some of my modern Marble King cat's eyes, and in a vintage jar.
I once had a popeye with three or four colors of glow, including blue. But I sold it. Darn it!