Why is red/green such a common color palette? One in twelve men is colorblind. (Interestingly the rate is 1 in 200 in women.)
I was told this is because the responsible gene is on the X chromosome, so having two X reduces considerably the odds of having 2 failing ones.
Red is considered a very lucky color in China.
Hence the emoji for chart increasing being mostly drawn as a red line
https://emojipedia.org/chart-increasing/
From the link at your link, yes, negative is green in Japan.
https://blog.emojipedia.org/why-does-the-chart-increasing-em...
I was told this is because the responsible gene is on the X chromosome, so having two X reduces considerably the odds of having 2 failing ones.