Having problems with redness in dark areas

Hey guys,

Having a bit of a problem in a scene I’m working on - the underside of surfaces is coming out very red and I can’t seem to remove it. I have had an extensive play with the post process volume and the only thing I can find that affects it is the indirect lighting colour setting under Global Illumination.

Making the indirect lighting tint a blue-aqua colour (below) seems to remove it fairly well, but then the blue shows up a lot in the distance… any thoughts as to how to fix this?