Quick way to get rid of the color cast
D3, F8, ISO 200, 1/2500, 600mm
The first thing I do in post processing an image is to open it in camera raw and make global adjustments.
Then I open the image in Photoshop and correct the color cast before doing any further processing.
Go to layer menu and select new adjustment layer > curves
In the curve dialog box, under blending modes, choose color and press OK. This will open the curve dialog window. Click auto (in the top right hand corner) and this does a good job of correcting the color cast.
Give it a try.