The number of crayons in a Crayola box doubles every 28 years.
What colors have been in said box over the years?

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Cool! I really wanted to be able to hover over a color and have it tell me the name of that crayon! And it would be nice to see a counter at the bottom of each year column indicating the number of crayons represented.
I recall that every year or so we would get a new box of 64 crayons. I would kept the old worn down but still usable crayons in the old boxes and see how much the cost increased over the years – at least until they stopped putting price stickers on everything!