How do I turn on the colors on my keyboard back on.

You mean to enable or turn on the keyboard back light? If yes, look for backlit key on the keyboard. It will be on either the F5, F6, F7 or F10 key. Press correct key to enable or disable the back light on keyboard. Please click on link below for additional information that might be helpful to you.

https://www.dell.com/support/kbdoc/en-us/000132120/how-to-turn-off-or-on-and-troubleshoot-the-backlit-keyboard-on-your-dell-notebook-computer?msockid=1e2ef5db4e94608b0770e33e4

Well you can try the Keyboard Shortcut:

Fn + Keyboard Light Key

Common combos:

• Fn + F5

• Fn + F9

• Fn + F10

• Fn + F11

• Fn + F12

Press it multiple times to:

• Turn on

• Increase brightness

• Change color modes (on RGB keyboards)

Any updates Kelby73? You are able to turn colors on keyboard? If no, list exact Dell model number and version of windows. Example; Dell Inspiron 3543, windows 10

To find Dell model number, press windows key and R key at same time. In command box, type msinfo32 

In system information, stroll down to System Model.