They are the easiest colors to read.

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oh! that makes sense

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I'm all for green ink, myself.

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ahah green is cool :D

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Convention?

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i kinda wonder why those colors became standard

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cheap or maybe it is formal. Maybe I will research why someday!

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haha let me know when u find out!

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copy machines like them

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true, i can barely see other colors if I don't use blue/black ink

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because we are conformist.

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