check out this colour styling guide @alfazmalek
https://steemit.com/steemit/@lucks/a-small-guide-using-colors-and-symbols-with-steemit/
If you into dApps should check out School of Minnows idle upvoting engine
https://steemit.com/voting/@lanmower/school-of-minnows-is-a-free-value-added-service-that-makes-you-money