If you check in Firebug, you will see that it is this rule that’s specifying your post title colour:
#main h2.entry-title a, #main h1.entry-title {
color: #416DB7;
...
}It’s in style.css on line 1356.
You could change it directly, but generally speaking it’s best to make changes like these in a child theme.
As long as your new rule is later in the cascade than the existing one, it will override it; if it has the same or better specificity of course.
HTH
PAE
