I don't know how your tank is set up but check out some lps, brain corals(open, folded, or modern) come in vibrant red colors and are pretty easy. Ricordias are harder than the brain corals, and the blue ricordias almost always eventually turn green. Acans aren't that easy but you get the pinks and reds. Snowflake polyps will give you awesome blue but sometimes can take the tank over.