What are the color ports on the back of my computer for?

Found this on wiki...

Orange, purple, or grey: Keyboard PS/2
Green: Mouse PS/2
Blue or magenta: Parallel printer DB-25
Amber: Serial DB-25 or DB-9
Pastel pink: Microphone 1/8" stereo (TRS) minijack
Pastel green: Speaker 1/8" stereo (TRS) minijack

Hope this helps. Have a Good Day. :)