Adrian, I love this! I’m working on the proposed SC for WCAG 2.1 proposed SC 1.4.11 Non-Text Color Contrast and your change fill in the rebuild totally made my day!

One question I have…could you add thin dark outline on each light grey grid blocks? For people with low vision those light grey boxes have very little contrast with the white…and I think they do add value (are informational).

What do you think?