You know you're screwed when you Google for an answer on something, and all that comes up is stuff you yourself already wrote on the topic.
Don't laugh. This actually happened to me yesterday.
I've written a lot of "how-to" posts here on AR about using both the WordPress and Typepad blogging platforms. For safe-keeping, I republished many of the posts on http://www.dablogmother.com
Anyone who has read my posts regularly knows my primary motivation isn't really sharing the knowledge, (although that's very fortunate side benefit) it's making some notes for myself so the next time I need to do the task, I can remember how to do it. Since if more than a couple hours has passed since the last time I did the thing, I most certainly will have forgotten.
Anyway, yesterday, I received a contact from a reader on www.dablogmother.com
The reader was using a TypePad "Pre-defined Theme" called "Modernist Cherry." Here is what it looks like in default mode, straight out of the box.

The reader wanted to change the color of the Post Header from light blue to black.
Quite frankly, I haven't used Pre-defined Themes much, since it is actually quite simple to build your own theme from the ground up using TypePad's custom theme wizard.
But any Pre-defined Theme can be customized, too, using Typepad's Custom CSS editor.
The reader had tried to change the Post Header color using this CSS code in the Custom CSS editor:
h2.post-title {
color: #000000;
}
It didn't work.
My first suggest to the reader was to try
.entry-header {
color: #000000;
}
Nope that didn't work either. Obsession is a typical Geek personality trait. At this point, obsession kicked in. I was going to make that Header color change no matter what.
I Googled various combinations of words relating to making the color change, and kept stumbling across my own posts about TypePad, both on Active Rain, and on daBlogmother.com.
Evidently my brain is equipped with an energy efficient light bulb. The light bulb came on very slowly. This entire cognitive exercise took about two hours. I am slightly embarrassed to admit that, but now that I know the answer, doing this in the future will take less than two minutes.
The Post Header is not just a Header. It is ALSO A LINK to the permanent, single page archive of the post. (This is true in WordPress, and all other blogging platforms, too).
In order to change the Post Header color, I need to change the CSS code for header LINKS.
Once that realization percolated to the surface, I threw in color change for the Sidebar headers as well.
Here's the CSS code to paste into the Custom CSS editor
entry-header {
color: #000000;
}
.entry-header a:link { color: #000000; }
.entry-header a:visited { color: #000000; }
.entry-header a:hover { color: #000000; }
.entry-header a:active { color: #000000; }
.module-header {
color: #000000;
}
.module a:link { color: #000000; }
.module a:visited { color: #000000; }
.module a:hover { color: #000000; }
.module a:active { color: #000000; }
(You'll notice I cleaned the code up a little since first posting it in Mother's comments)
Here's the finished product

Piece of cake, once the light comes on. If you want your post headers a different color, (Black is #000000) just change out the color code numbers to your desired color.
Here's how to use on an online Color Picker
Hi Cheryl, I'm sorry you said not to laugh but I did! thanks for sharing