Examine source code of Solus KDE Blue+

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Solus Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(39, 43, 70)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(34, 36, 37)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(4, 5, 36)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(16, 17, 47)",
      "popup": "rgb(4, 5, 36)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(117, 120, 147)",
      "button_background_hover": "rgb(10, 123, 182)",
      "icons": "rgb(255, 255, 255)",
      "tab_selected": "rgb(9, 82, 127)",
      "tab_loading": "rgb(16, 17, 47)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5037d0ec-e771-40de-9e0a-39bdf8676737}"
    }
  }
}