Considering all the red you see when taking off the HTC EVO's battery/back cover, you probably wouldn't be too surprised to hear that the black plastic trim on the phone's back is also naturally red. It's just covered in black paint to match the battery cover.
If you scrape that paint off, which you can do with a razor blade or similarly sharp-edged item, you can get your EVO looking just like the one you see above, which belongs to lookout4theyeti from the xda-developers forum. The project takes about 45 minutes to complete, give or take about 20 minutes, depending on your skills, creativity, and bravery.
I don't know if the finishes would be the same, but this simple mod could look really nice with one of those red back covers. A clear cover would look great too.[xda-developers] Thanks, MsRandall!