So, quoting out from another thread:
This implies to me that no colors are hard blocked from being selected by the RNG over all.
However:
So some colors are very unlikely to ever be selected, especially in the lower tiers.
Some good news:
So if there’s no artificial limit (blacklisting), and gleam can select any initial hue, @James has implied that a black gleam planet is possible. Maybe not even weighted against.
It took 500 worlds in rapid fire to see over 200 colors. It’s not clear to me whether this variation is per block type or not.
For those who want to roll for colors:
If you can lock the color in a gem profile, it should be selectable for planets of any profile/tier afterwards, right?
So we have the implication that every color of gleam is possible, and a tip on how to most efficiently roll the RNG for new colors.