Examine source code of muted greens

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "greens",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(174, 181, 153)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(44, 46, 35)",
      "tab_background_text": "rgb(226, 228, 221)",
      "toolbar_field": "rgb(73, 81, 63)",
      "toolbar_field_text": "rgb(251, 251, 251)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(66, 76, 52)",
      "popup_highlight_text": "rgb(137, 101, 101)",
      "tab_background_separator": "rgb(49, 49, 35)",
      "tab_selected": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{51089fd6-5d5a-4705-b277-b1466a0e85c2}"
    }
  }
}