I want to share my workflow in correcting the bluish tint using the white balance in VFSU
1. Here is my render with VFSU. In this Render I purposely added more bluish background tint..
2. I saved the image and opened it in Photoshop. Using the sample eye dropper tool, I clicked the color. In the Color Picker tool the RGB can be read.
3. In VraySkerchup Camera tool, I entered the RGB values in the White Balance box.
4. Here is the render with corrected white balance.
I increase the exposure in the render. Notice the bluish effect of the sun is lesser.