I created this color chart for my studio use. I have it printed in many different sizes for use with various models and items I'm photographing. It helps to have a real world "known" color to compare and use in your digital darkroom.
I simply take the first frame before a set with this chart in the frame (ask the model to hold it, or set it near the subject you are shooting). Once you start developing the run of shots, you can adjust the first image so that the colors are correct then apply those color correction settings to all the images shot with the same lighting and settings. It makes workflow so much faster.
If you use this chart and enjoy it, let me know!
Web sized chart below, click it for the full sized high resolution TIFF for printing.