1.Go to "Template" -> "Customize" -> "Advanced" and then choose the element you would like to change the color of:
a. Page Background Color. b. Text Color c. Link Color d. Page Header Color
2. Choose the color. Then choose the color you would like that element to be. You can either click on the color you want or enter the color hex code:
3. Click on the "Apply to Blog" button to save the color settings.
4. Done :)