Where can I change these colors?

Hi everybody!

I'm experienced in PHP/MySQL/CSS/HTML5, but new to Opencart!

I heard a lot about opencart, and it is wow! I'm so happy to discover a great shopping cart!!!

I learned to change colors and layouts on default theme. But sorry, I could not find a few things. Please help:

Where can I change these colors on default theme?

1.) I clicked on "My account" (on top menu), its background goes gray. Where can I change it?

2.) Background colors of "Add to cart", "Add to whish list" and "Campare this Product" (on product list).

3.) Tab ("Description", "Specification", "Reviews") buttons' Background Colors.

4.) Links' Font Colors, Link Image's Border colors (on all pages).

Waiting for your valuable tips, hints and they are big help!!

Did you change these colors?

No, do you searching? if you find, please share it here.

Thanks.