Indigo
When Sir Isaac Newton looked at the continuous spectrum of white light dispersed through a prism, his superstitious mind couldn't bear to name only six colors. Being that six was a number of the devil and that there were seven planets and seven notes he added the dark blue «indigo» color in as one of his fundamental colors of light to round out the number of colors to seven.
This is indigo.
For centuries, Indigo used to be a very valuable dye; the exclusive looking deep blue color was a sign of wealth. Of course that «exclusivity» went down the toilet when they developed synthetic indigo in 1905 and everyone with a new pair of blue jeans could have some of that exclusivity.
Found on Slashdot, deep down a discussion.
posted by Alex Gusev @ 00:14
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