Reiterating: thank you for this! I've been tweaking a skin that I really like.
One of the final pieces I'm looking for is the sort arrow (ascending/descending):

I found line 115 of the Sample Skin:
<element id="Content[TrackDetail].Body.ListHeader" bg="240,254,253" bg2="240,254,253" fg="10,102,196" bdr="35,156,217" /> <!-- 79,177,225 auto-generated -->
But changing the `fg="10,102,196"` value there changes both the color of the column header text AND the sort arrow. Is there a more specific selector I can use to give that arrow a unique color?