Examine source code of Blue Color

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue ",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-042-ce07393efde7786b9dae05d4718b10e5.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 255, 255)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(115, 214, 228)",
      "tab_background_text": "rgb(84, 84, 84)",
      "toolbar_field": "rgba(255, 255, 255, 0.53)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(231, 242, 244)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0df9fa2c-28d0-4c6e-aa7d-8b65f4cb4f0a}"
    }
  }
}