Examine source code of Colors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Colors",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(66, 48, 71, 0.96)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(34, 149, 215)",
      "tab_background_text": "rgb(251, 246, 246)",
      "toolbar_field": "rgb(229, 157, 38)",
      "toolbar_field_text": "rgba(66, 48, 71, 0.96)",
      "tab_line": "rgb(227, 255, 0)",
      "popup": "rgba(162, 160, 176, 0.87)",
      "popup_text": "rgb(18, 15, 15)",
      "icons": "rgb(223, 221, 233)",
      "tab_loading": "rgb(227, 255, 0)"
    }
  }
}