Crayons and math

Apparently, the number of colors in a Crayola crayon box (yes, I still have my 64 color box in almost mint-condition for rainy days) doubles every 28 years--and there it is, Crayola's Law. No longer is my box of 64 up to date (although in the hipster world, I assume it's still top-notch). But come 2050, with my coloring book ready, you can count on it that I will buy that box of 330 colors.