Forked from siege-media/contrast-ratio (and detached from it) after Lea Verou sold the domain contrast-ratio.com to SEO company Siege Media and ownership of the GitHub repository was transferred from the original developer to the aforementioned company. (See Contrast Ratio has a new home — and this is great news! (18.03.2023) on Lea Verou's website.)
Temporarily hosted on GitHub Pages.
MIT License, i.e. the same licence that has always applied to the tool.