Change font and color everywere

Hi! I really need help to change ALL the orange color in the theme. I have remove a lot but i still have the orange color everywhere in woocommarce. my site is: https://substansgbg.se

And I also want that my social icon on the frontpage open in new window when I click at them.

And its blue and orange in the cart, on buttons and other stuff. I want it clean in just black and white. Hope someone can help me!

And one more question, how can i get oswald on everything? Even in the main menu…

The page I need help with: [log in to see the link]