Nothing whatever. By the time the sun reaches that point, we will all have long since become dust.
Oh well, Spryte, if you are asking will humans comparable with today's humans perceive color differently, the answer is of course yes. We see that all the time. For example, in a stage production the appearance of the set and the characters changes quite distinctly, according to how the lighting technicians illuminate the set. Using all red and green lights (gelatins) gives quite a different perception than illuminating with, say, pinks and yellows.
We see colors mainly as reflected light waves. We cannot see colors that are not present in the incident light, and we cannot see colors that are absorbed by the object being lighted. So, for example, it is hard to see a blue shirt under a blue light.
When the sun changes the color spectrum of the light it sends to this little piece of gravel in space, we will certainly -- as they say -- "see things in a new light".