CSS Codes needed

Dear support team.

1.) on http://www.bts.eskadi.com homepage on the botton you find blog items. On the left and right are bottons with arrows to change them. In the background there are back or while hovering about them blue balls. I would just like to see the arrows without balls. Could you please give me a CSS code?

2) If you click on a blog item and you hover about the submit botton, this botton becomes black. It should become have this color #00c0dd. Could you please give me another CSS code?

3) If you go to blog the read more tags get black while hovering about them. They should be blue #00c0dd

Thanks for your help