Custom white balance
By combining white balance presets with a manual tweak of the Color Temperature slider you should be able to get your colours looking balanced and more natural. If you’re not sure which WB preset to use you can grab the Gray Point Sample tool from the toolbar and click on an area that should be white or neutral grey. If you click on the foreground girl’s white dress the Gray Point Sample tool will detect a hint of blue in this shaded area. It will then warm up the sampled area until the whites of the dress are a neutral white. This will correct the colours in the rest of the shot at the same time.