Examine source code of Katrin Knuddel Schultz

{
  "name": "Katrin",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "moz-logo-bw-rgb.svg"
    },
    "colors": {
      "frame": "rgba(42, 85, 176, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(201, 40, 40, 1)",
      "bookmark_text": "rgba(186, 26, 26, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 0.61)"
    }
  }
}