Examine source code of Green Blue Yellow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Simply Blue 1",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-039-717a66ba4d455686088c80f391cb3264.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(19, 75, 60)",
      "toolbar_text": "rgb(176, 202, 195)",
      "frame": "rgb(51, 96, 127)",
      "tab_background_text": "rgb(232, 232, 13)",
      "toolbar_field": "rgb(41, 41, 66)",
      "toolbar_field_text": "rgb(196, 224, 230)",
      "tab_line": "rgb(240, 152, 8)",
      "popup": "rgb(23, 65, 109)",
      "popup_text": "rgb(197, 247, 213)",
      "tab_loading": "rgb(240, 152, 8)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{801bd4e1-3400-4cb4-a120-99a06e62baab}"
    }
  }
}