Where can I change the color of Page / Post Title?

Take a look around line 219 for code that looks like this –

body,
h2 a,
h2 a:visited,
h4.widgettitle a,
input,
.author,
.post-comments {
	color: #333;
}

That will change everything, so you could split some of it up, like the “h2 a” and add your colors in.

I meant pull out certain parts like the “h2 a” and place on its own like this –

h2 a {
    color: #c01324;
}