#header h1 a {
	color: yellow; /* or use this code instead of yellow #FFFF00 */
}

Your original questions wasn't about this particular change was it? incidentally, if you want all the text to be yellow on your blog then this text does it in one change:

body {
	color: yellow;
}

Some people might say this is not a good idea a method it is.

Thanks JayAnne

Here is an example to just change the post titles from red to a darker yellow color so you can see it working:

h2, h2 a, h2 a:visited, h3, h3 a, h3 a:visited {
	color: #FFD700;
}

There are several other spots where the color is set to red though. Here's how to change all of them at once:

.postcomments span,
.postcomments a,
h2, h2 a, h2 a:visited, h3, h3 a, h3 a:visited,
.fourofour,
a,
a:hover, h3 a:hover,
h2 a:hover, h3 a:hover,
.commentmetadata,
.commentmetadata a,
.rightnav a:hover,
.leftnav a,
.leftnav a:hover {
	color: #FFD700;
}

.menu-header ul ul a,
.menu-header li:hover > a,
.menu-header ul li.current_page_item > a,
.menu-header ul li.current-menu-item > a {
	background-color: #FFD700;
}

To figure out what color codes to add, I looked at the original theme stylesheet here:
https://s-ssl.wordpress.com/wp-content/themes/pub/greyzed/style.css?m=1333998335g&minify=false

And I found all of the spots where the color property was set to "color: #cc0000;" I copied all of the selectors for those, put them into a comma separated list, and made one large rule for them (which you see above).

If that yellow still looks hard to read, try #DAA520.

Please try removing the "*/" from the very beginning here:
https://palaprecision.wordpress.com/wp-admin/themes.php?page=editcss

After that, just to make sure, you want to change ALL fonts for everything, even links, to yellow? Are you sure?