Acid staining allows about ten color options, and in this range are soft, earthy browns, tans, terra cottas, light blues and greens. The finished color will have a textured leather, crackle, or solid look. Acid-stain colors can also be mixed, or one color coat can be done on top of another.

acid stain - color chart

Concrete Staining 101 : Acid Stain and Water-based Staining
Water-based Stain Color Options
Concrete Staining Installation