About WCAG Contrast Checker
WCAG Contrast Checker was shaped around one concrete need: the readability difference between foreground and background colours. The input is a colour value, picker choice, or image, the central operation is to examines the supplied value and reports the relevant finding, and the intended outcome is usable colour values and visual guidance. That sequence makes it useful for design decisions, palettes, gradients, and accessibility checks.
Readability between foreground and background values is the point of the check. Taken together, these details make WCAG Contrast Checker suitable for design decisions, palettes, gradients, and accessibility checks.