Darkkle Gives Google Sheets a True-Black Canvas

Field notes

Darkkle works around a specific rendering constraint in Google Sheets: the spreadsheet grid is painted on an HTML canvas, which generic dark-mode tools cannot recolor reliably. The extension hooks those drawing operations and coordinates grid, selection, header, and border tints while preserving user-selected cell colors. It stores appearance profiles separately for each spreadsheet and supports JSON export and import. Installation is manual through a downloaded ZIP and the browser’s Load unpacked flow.