this may be background color and you can change this color under Theme options > Colors > General section. But to make slider cursors smaller, you need to use custom css probably. If you will send us url to site where you want to do this, we'll have a look on it.
Sorry, we missed that color. It's "Header background" option under Theme options > Colors > Header section. But to make slider arrows smaller, please use below code:
Maybe it's because of cache or custom css under Theme options > Custom CSS & JS > Custom CSS section? If you don't know what you did wrong then maybe you will use below css because looks like this is what you are waiting for:
Comments
this may be background color and you can change this color under Theme options > Colors > General section. But to make slider cursors smaller, you need to use custom css probably. If you will send us url to site where you want to do this, we'll have a look on it.
Thanks!
About buttons on slider, this is how they works in responsive mode.