A userscript that adds a color swatch next to the code color definition

• It works in comment previews and code pages.
• Supports hex, rgb, rgba, hsl, hsla and all named colors.
• Additional support for colors set inside strings (e.g. javascript or canvas).
• It does not interfere if you copy & paste the code.
• In v2+:
  • You can use Tab to navigate between swatches.
  • Pressing Space and Enter will toggle the popup (when focused).
  • Pressing Esc will close all popups.

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