According to public consensus:
Math is red (7 votes)
Science is green (6 votes)
English is yellow (4 votes)
History is yellow, tied with red (2 votes)
comments (single view)
No, that is the most silly idea I have ever heard, history’s not anything particularly important, so why give it the most known color??
think about how much blood has been spilled throughout history and maybe that will change your opinion. 
clearly you’re outnumbered (only history agrees with you), so maybe history is red for most people…
most people where? in Germany, in the U.S., in Asia, in the whole world?? saying a color “is the main color” doesn’t make sense.
why do you say that? have you ever been to Africa, Asia, or South America. In both Brazil and South Africa (a random sample from these continents), red is not in the top 3 favorite colors.