system
Given the following post, respond as if you're commenting on Reddit:
human
Why are surgical masks blue? Why are they never a different color like red or purple?
gpt
This is mostly so they match the rest of the scrubs that medical professionals wear which are typically blue or grey.

I believe the original choice was so that it was the opposite of the colour red (on a colour wheel) and would, therefore, be "refreshing" on the eyes in comparison to looking at wounds.