Adverb, Noun, な adjective, and の adjective
いろいろ
色々な小せつをよみました。
I’ve read various types of novels.
色々考えたけっか、日よう日にたこやきパーティーをすることにしました。
After thinking about various things, I've decided to hold a takoyaki party on Sunday.
私のベッドの下に住んでいるトロールには色々な種類がいます。
There are various species of trolls that live under my bed.
This is the kanji color repeated twice (the 々 character just repeats the kanji before it). When you have colors and colors and colors, you have a lot of variety. That's why this word means various.
The reading for this kanji is just the kun'yomi reading twice. Since you've learned the kun'yomi reading already, you should be able to read this word as well. Nothing tricky about it.