Hello @jjambeck,

To change the color of the header bar in the mobile view, please paste in the following custom CSS in your Admin Dashboard > Appearance > Customize > Theme Options > Custom CSS Options :

@media only screen and (max-width: 768px){
.mean-container .mean-bar {
    background-color: #ed7f00!important;
}
}

You can replace the color hex code(#ed7f00) of your desired color. For reference on color hex, see the link here : http://www.w3schools.com/colors/colors_picker.asp

Regarding your request with the arrows, the theme currently loads up the arrows by default regardless the number of slides. To be able to control the arrow display shown only for multiple slide active you will need to make some code changes through Child Theme Approach.

After creating and activating child theme manually or with a plugin, paste in the following code block in your child theme’s functions.php file :

This will add the theme functionality of removing the arrow when single slider is added in the theme.

Hope this Helps,

Best Regards !!