First question:
That was answered for you here:
https://forum.graphene-theme.com/graphene-support/how-to-change-header-text-font-color#post-17694
(If you lose track of things you’ve posted about, you can just click on “member” under your name and a list of threads you’ve participated in will come up.)
Do you need something other than the post header codes? If so, let us know, or use Firebug.
Or do you just need codes for different colors? If so, Google “CSS color codes”.
Second question:
I’m not sure what you mean by “area around button”. Can you post a screen capture than shows this?