Hot to change color of Article Title from yellow

I've looked around the template and can't find how to change the article title from yellow to another color. Can you assist to tell me where to find this?

If you use custom style:
Template parameters:

Component Heading Color (H1)
Content Heading Color (H2, H4)
Content Heading Hover Color

if you use pre-defined style open:

styles/stlyeX.php

and change values of:

$componentHeadingText
$headingText
$headingHoverText