woocommerce – how do you change the colour of some buttons?

Hi,

Im a wordpress noobie. I want to change the colour of a few buttons and input boxes on my site. Namley:

the drop down “sort by” menu in the shop,
the “read more” links on each product thumbnail,
the input fields on the contact me form.

I’m using the woocommerce plug in and tempera theme

My website: http://www.sacred-art.org

thanks