Widget index / Specialized controls · Download this HTML
Ready — try the example.
States and behavior
Swatches, RGB values, preview draft, committed well, validation and cancel rollback.
Keyboard
Tab reaches the palette and numeric fields; arrows select a palette color; native number arrows edit components; Escape cancels.
Scope and adaptation
A deliberately small browser color dialog. It does not emulate the native Windows custom-color store, hue/saturation plane, system palette or color management.
Sources
Microsoft preliminary guide (1995), chapters 7–8 · Modern browser accessibility pattern
Original implementation; system colors are represented by CSS variables. The default 13 px system-font stack is a readable browser adaptation. The 1995 source is preliminary, not a final product specification. Test the target browser and native host before shipping.