Preferably more force/relax colors, like more greens, blues, vibrant colors,
maybe even some unique colors like say a rainbow

I know you can do this with join textures, but it might be less of a hassle buying forces instead.

They just came out with Magma
~ give them some time dude they know that we want colors

its really hard to make new colours.
because they will look like some which are released already.
that means yea they could bring out new items, but the visual effect that they changed something is not able to see with eyeДs.
so dont expect that they bring all 2 months a new colour.
may 1 in a year.