Remove a color cast

Download this image to test drive the Color Cast removal feature found as part of the Automatic Color Balance.

Select your blue color cast image insert, Copy and Paste As New Image.  Then apply your Automatic Color Balance (see below)

Menu > Enhance Photo > Automatic Color Balance

Afterwards, try some Clarify on your sample.
Effects > Enhance Photo> Clarify set at 5


Multiple applications of Clarify
Followed by Edge Preserving Smooth
Followed by Unsharp Mask