I made the Live 9 Default skin a bit darker for using at night because I'm not a fan of Disco.

Instructions:

Put the file into Live's skin folder.

-PC: C:/ProgramData/Ableton/Live 9/Resources/Skins

-Mac: Applications/Live 9 (cntrl-click)/Show Package Contents/App-Resources/Skins

After doing that, go to Preferences and change the skin!

If you want to create your own skins for Live 9, you need Max for Live and this M4L device. It's a bit of trial and error. Here's a resourceful page from MacAbleton to get you started.