severe blue cast or mask fix
well spent a moment having a play around with the image, see what i could do, best results where much better than original image.
Colours > Retinex (Level; High) can play around with the bars if you want. >
Colours > map > Sample Colourize > get samples > 0/ 2.34/ 200 will remove most of the blue
duplicate layer > desaturate > Illuminisoty > make sure layers at top > set layer mode to hardlight > New from visable.
create a selection of the hair where its all pinky > colour > hue saturation >
turn red and magenta's > lightness -100 > saturation -100
repeat Hue saturation until hair is black.
Alternatively you can de-saturate, create selection regions and colourise the areas.