Here's some themes I made for TWRP.
Thanks to Nemo Aeternamn for all your help with this.
*Note: This one is all red, no yellow. Just a bad picture
How to Install Themes for TWRP
-Download & rename to ui.zip
-Place the ui.zip in sdcard/TWRP/theme (If you don't have a theme folder, just create one)
-Reboot to recovery
Where to get TWRP
TeamWin - Home | TeamWin
How to Theme TWRP yourself
TeamWin Projects - TWRP 2 - Theming | TeamWin