Screenshot of an “APCA Contrast Validation and Colour Suggestion Tool” interface. At the top are controls to select a foreground hex colour (with a vertical list of selectable hex values on the left), text style options (bold and regular, with regular selected), and a font size dropdown set to 12. The main panel shows a table titled “Compliance Matrix (Lc = Lightness Contrast)” with columns for background hex colour, colour swatch, sample text preview, APCA Lc value, APCA status, proposed hex, proposed Lc, and proposed sample. Rows display multiple background colours with sample text reading “Sample Text – OOOO.” Several rows are marked “Fail,” some showing proposed replacement hex colours and others showing warning icons and the text “No accessible colour – increase font size,” indicating that colour changes alone cannot meet contrast requirements. The table visually previews contrast results and accessibility recommendations based on APCA.