Who invented the color blue?

--> The cavemen came up with the idea after seeing water.

Why is sadness represented with the color blue?

--> blue can remind you of a rainy sad day, so it can invoke those feelings.

When did that history start?

-->Maybe in olden times when purple symbolized royalty, blue also had a significant meaning.

Where did the color blue originate?

--> In the ancient times when blue represented a certain meaning.

How did blue get its name?

--> Everyone agreed on the same sounds to associate with the sky and things that had similar coloring.

Did the symbol of the color blue change over time?

--> Most likely...blue was most likely symbolic in different cultures, groups, and time periods.