This is one of those shots where the true color of the shot simply doesn’t exist in the Blu-ray. Note the magenta of the cup on the left, which is supposed to be white, still retains a magenta hue in the correction. Similarly, Luke’s dusty offwhite shirt has too much green in the highlights and too much magenta in the shadows, and the correction still doesn’t completely remove these inaccuracies.
This picture skews red but still shows how Luke’s shirt is definitely not white like Leia’s gown:
That is a good photo. If you correct for the red, it would have nice skin tones and maybe more blue to the walls in the background. It does show the basic relationship between the “whites” of these three costumes. Leia’s is white but has dirty spots. Luke’s is a bit gray, like something that has been washed 1000 times but no longer is perfectly clean. Han’s shirt is slightly yellow (not overly, but a little too much to call cream).