Text Cannot Be seeing

1 - I selected the Blue Theme for my blog and because of that, when I try to create an article, the top bar with the below links are invisible. How can I turn those text to white so I can see them?

Add Media Add Post Embed Video Add Cover Add Location

2 - I need to move the Read More from the bottom to right below the last paragraph so its more visible. It's too hidden at the bottom of everything else.

Thanks