There is few tricks to know
The project Fifty shades of <color> use jQuery & a wonderful script of Tim Pietrusky, called _select.
Licensed under Apache 2.0
is a joke, and was inspired by the title of the book "Fifty shades of Grey" by E. L. James.
Fifty shades of #000000
Change the 6 hexadecimal color value ... With an other 6 hexadecimal value..