Coloring the light

https://cgcookie.com/lesson/eevee-world-environments-and-ao?wtime=179

you color the lights and get a really nice effect at this when I set my light it acted as if there are 2 colors going on. one I select that the light gives off then one that casts on to the objects (Orb and ground ) that are the opposite color on the color wheel?

Any idea what is happening, and how to fix it?

  • Hey Legacy Of Wax!

    If you look at this from the side, it might become clearer what is happening:

    The purple light you see is coming straight from the light, but some of the light got scattered and indirectly reaches your eyes/camera.

    That light is the 'opposite' of the light that reaches you, as the light  itself is white, which consists of 'all' colors.

    This is why the sky is blue, because all other colors got scattered by tiny particles in the atmosphere (Rayleigh Scattering)...

    I will stop here, because I could go on forever, but you might wanna try and change the Anisotropy, which controls the direction of the scattering.