apca-introduction

commit

da53b32fc80f93d49aa9ee03c8470314c841a45a

parent

313921840729ddcb3a9f0bc64db04ee982ed43ed

Author

Tobias Bengfort <tobias.bengfort@posteo.de>

Date

2022-07-14 08:20

sum up APCA results compared to WCAG

Diffstat

1 files changed, 6 insertions, 0 deletions

diff --git a/README.md b/README.md

@@ -63,6 +63,12 @@ function contrast(fg, bg) {
   63    63   usually work with the absolute value though.
   64    64 - WCAG 2.x defined three thresholds: 3:1, 4.5:1, and 7:1. These roughly
   65    65   correspond to 45, 60, and 75 in APCA.
   -1    66 - Compared to WCAG 2.x, APCA reports drastically lower contrast for darker
   -1    67   colors. It also reports slightly higher contrast for lighter colors.
   -1    68 - With WCAG 2.x, 40% of all color combinations meet at least level A, 26% meet
   -1    69   at least level AA, and 15% meet level AAA. With APCA, only 37% of all color
   -1    70   combinations meet at least level A, 23% meet at least level AA, and 11% meet
   -1    71   level AAA. So APCA is stricter.
   66    72 
   67    73 ## Examples
   68    74