Names given to the perception of various visible wavelengths of photons, either reflected or transmitted

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26
votes
3answers
1k views

How indistinguishable is blue from green really?

青 ao seems to be used very much interchangeably for both blue and green. Why is that so, and how does 緑 midori play into this?
12
votes
1answer
362 views

Why did オレンジ replace 橙【だいだい】?

This question about colours got me thinking: Why, and how, did オレンジ come to replace 橙【だいだい】 to refer to the colour orange? It seems weird to me that a word taken from a foreign language became ...
4
votes
1answer
250 views

Why does 赤 have a negative connotation?

赤 is generally understood as meaning 'red' (which can explain combinations like 赤子 (red face of a crying baby)). However, I have seen some words with 赤 that have a negative meaning, 赤 possibly ...