Sensations are not felt the same way by every person.
Food tastes differently to each person.
In the same way, there is no absolute color that is inherently seen the same way by every person. Nor is every person's vision the same. However, a group of people probably won't agree on which tomato is the reddest, or how a group of tomatoes should be ranked in terms of their redness. Beyond the physiological factors that impact our vision, there are psychological factors as well. Sometimes we have inbred emotions related to certain colors.