Control Color Overlay

You can choose to put a slight semi-transparent overlay on the slider images. This is especially useful if you want to adjust your slider text for readability, in case your photos have a high contrast. 

Click here for a demo of the custom color overlay.

The control can be found in:  Appearance > Customize > Front Page > Banner / Slider > Show Color Overlay/Filter? Once toggled on, you can choose the specific color you want to use for the overlay.