Predicting phenotypes - outward traits such as hair colour or eye colour - from DNA information is an emerging field in forensics.

BBC: Forensic test can predict hair and eye colour from DNA

Bacteriorhodopsin has the habit of changing from blue to pale yellow in an electric field, which might be useful in colour displays.

ECONOMIST: Showing off

If language does affect colour-perception, then it is more likely to affect perceptions from the right visual field than the left.

ECONOMIST: Psychology