Why Are These Cube Bottoms A Tannish Color?

The title, thanks in advance.

Looks like there’s some kind of red-ish light coming from the bottom. Do you have an HDR in your skylight?

You might want to try the “Lower hemisphere is black” option in the skylight.

The “Lower hemisphere is black” option has already been enabled and there are two sphere reflection capture objects in my scene, I tried deleting them but that did not fix the issue. I just tried deleting the entire skylight and that didn’t seem to work either.

I rebuilt the lighting and that seemed to have fixed it.