I was recently looking at an interesting video and I came across this thing https://youtu.be/-0MD1g_5dV4?t=217 . This is a timed link which shows clicking of pictures with a color standard palette in the field. I'm assuming it is for correcting colors later on in the image.
Can someone explain a little bit in detail of how to use this color palette from the photo in correcting colors?
Can we do this using shaders and lighting within Blender?