Get Rid of Black Background when using Environmental Lighting

Using Blender Cycles 2.79…I’m using using environmental lighting, but also have a black background behind my model. How do I get rid of the black, without losing benefit of the environmental image being used? I do not want the environmental image to show as a background - only the lighting effects, and would like to change the color of the black.

Thanks for any help!

In render settings find the film tab and click transparent
In compositing nodes, render layer into alpha over (second input) - black coloour as first input.

Perfect, yogyog! Thanks so much for the quick help!