Let's talk paint colors! I'm working on my playfield now. I found that Liquitex Professional Heavy Body Pyrrole Orange is a very good match for the orange straight out of the tube.
Liquitex Professional Heavy Body Prisim Violet is close to the purple as well. It is a teeny tiny bit dark but I used it as-is in a few spots and you would not notice if I didn't point them out.
The green is tougher. I finally hit on a mix that works. A good starting point is the Liquitex Light Amber Green. To this I added a LOT of Liquitex Basics Cadmium yellow light hue that I happens to have on hand. The pigment load on the basics line is pretty weak so my green paint probably has more yellow than green! I added a small amount of white to lighten it and was close but still off. I added in a VERY TINY amount of the Pyrrole orange and it came out very good. The orange has a very high pigment load so it goes a very long way toward changing the color.
It looks like the green is darkening a hair as it dries (and the camera exaggerates the difference) so I'm going to go a tiny bit lighter on the second coat. The finish is still very rough, just posting these pics to show the colors.IMG_20190806_080620.jpgIMG_20190806_160311.jpgIMG_20190806_161831.jpg