This page is based on code written by Benze Szabo and explained in detail in the article Which Colors Look Good on Black and White?
Choose a contrast level to see colors that have this contrast or above on both black and white.
Granularity determines how much the r, g, and b values should increase for each color. A low granularity calculates many colors, and MAY CRASH THE SITE for low contrast values. Choose wisely!
NOTE! WCAG recommends a minimum contrast of 4.5 for regular text on background.