In general they can do any color you want, as long as you provide the right Pantone or RAL reference.
Here is a sheet with Pantone ones: https://docs.google.com/spreadsheets/d/1UZ6UEuG95xwcYVxeFkX9yzxlZV7NgETX8P8weUrZIV4/edit?usp=sharing

Beware your screen will show a color differently than the real one.

Look for a color you like, and then search pictures with the reference on the web.
To see items painted in that color. Again this is false colors, but it gives a better idea.

And the best is to look at physical color chart in a paint shop for instance.

Then you can draw patterns, add sequins, or a metallic effect, etc. at extra cost.

Just joined the forum, ordering an AM 831, they promise reasonable shipping time; we will see.
What I don't understand is why it looks like many people ordered the frame but apparently nobody has received it or reviewed it; so I'm buying blind, the frame is cheaper than a branded one but not cheap in absolute. 9 years ago I bought an hardtail frame and I'm still using it and I'm satisfied; full suspension has much more mechanics and things that could be wrong.
finger crossed...