Black - #000000
16 px
400 (normal)
#000000 - Text Color
#FFFFFF - Background color
The Accessible Perceptual Contrast Algorithm (APCA) is a method for calculating and predicting readability contrast. APCA is a part of the larger S-Luv Accessible Color Appearance Model known as SACAM. These models are specifically related to color appearance on self-illuminated RGB computer displays & devices, and also for modeling accessible user needs, with a focus on readability.
APCA generates a lightness/darkness contrast value based on a minimum font size and color pair, and this value is perceptually based: that is, regardless of how light or dark the two colors are, a contrast value of Lc 60 represents the same perceived readability contrast.
APCA Lc-106
21.0 AAA
21.0 AA