Space at bottom, read more button colors, highlight color on dropdown

Good afternoon,
I recently downloaded the Andrina Lite template. After reading through the forums on the website for awhile, I figured out how to change the highlight color on the menu at the top. However, it didn’t change the highlight color for the dropdown. Can anyone tell me how to do this?

Also, I’d like to decrease the space between the blog and the footer. It seems like there is a lot of white space.

Finally, I’d like to change the color of the read more buttons. Is there an easy way to do this?

Thanks,
Kristina