Changing some colors on six theme

[Norservers]

Hello. I'm doing some color changes to the six theme. I'm using custom.css. I got most of it figured out, but since i'm not expert there's some text and colors i'm not able to figure out how to change.

First one is the text color font on ticket reply message. This is all gray and are inherited(?) by something i can't find. It's not very readable. See image 1.

Second one is that the footer is flowing up i guess. There's white area if there's limited content on the page. See image 2.

Third one is the black text on image 2, part 2. 

Fourth one is the service colums. I can change the color for the entire column. But i'd like for them to have different colors on each service.

Suggestions would be appreciated. Thanks.