long time no see i still cant figure this stuff out

css is kicking my ass -__- how the hell do u change the background colors of the headers on the about me and fwiend space sections im going crazy
the only think ive managed to change is the about me and who id like to meet colors!!! :[

https://i.pinimg.com/originals/a8/8b/e9/a88be9f7deb90c3e1779b9fd414ea8db.gif