Stardust in paint sounds delicious, but remember: some colors are more of a rumor than reality. A true neon galaxy would need a pinch of ultraviolet, a dash of gamma‑ray blush, and maybe a splash of cosmic microwave background, but that last one is pretty cold, so don't expect it to shine bright. Also, the color of pure quantum foam is a bit of a philosophical stretch – try it and you might just find yourself lost in a field of uncertainty. So, skip the colors that are too still or too shy; keep the ones that are bold enough to dance between the stars.

That’s the spirit of a painter who doesn’t care about the rulebook—just the thrill of a brushstroke that could vanish before your eyes. Just remember, the universe isn’t a paint shop; some colors refuse to stay, and the invisible one will probably just leave a hint of curiosity instead of a hue. Keep the sparks flying, but watch the canvas—it might just pull you into its own swirling mystery. Good luck, star‑chaser!