The Color Contrast Checker for WCAG 2.1 to measure contrast of 2+ colors to comply with the WCAG 2.1 guidelines for improved usability and accessibility. This work has been supported by the UnIKT program of the Norwegian Directorate for Children, Youth and Family Affairs (Bufdir).
Fixed in commit cd2df726f24ab208c9e6786ca6c553275a94a7a8