Here’s a quick question: what colour is Twitter blue? That is, what’s the hexadecimal code that Twitter uses for their colour scheme?
Answer: it’s #55ACEE. Or, if you prefer RGB, it’s 85, 172, 238. There, don’t you feel better?
Confused? Don’t be. This cheat sheet from Online Circle Digital is here to help, and includes image dimension sizes for Twitter profile pages, background images, logo rules, colours and more.
(Source: Online Circle Digital.)