Changing color of ALL but body text - headlines, "Read more" text, etc.

Hi all - great forum, just joined, very helpful. I'm highly experienced with PCs & know basic HTML, but am an utter WordPress newbie. Sorry in advance for such basic questions.

I want to change the color of ALL text that is natively blue in Atahualpa. That includes headlines, text after "Read more" at the end of each post on the homepage, text in widgets (Recent posts, Archives, etc.), "Older Entries", and so on.

I managed to change the color of headlines on single-post pages, but not on the homepage.

How many places do I have to specify that color change in order to change ALL blue text?

Also: I tried changing the font just for the body text of posts, but that also changed the headline fonts. How can I change one without the other?

Thanks! (I just switched my rudimentary site to Atahualpa, like it a lot, & will definitely donate once I get some of these fixes in place.)