Examine source code of soft sage tones

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "soft sage tones",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-037-b73f9b34467ba541de861f5b4c0c6316.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(116, 142, 129)",
      "toolbar_text": "rgb(233, 229, 227)",
      "frame": "rgb(100, 121, 110)",
      "tab_background_text": "rgb(233, 229, 227)",
      "toolbar_field": "rgb(163, 186, 180)",
      "toolbar_field_text": "rgb(39, 68, 66)",
      "tab_line": "rgb(163, 186, 180)",
      "popup": "rgb(116, 142, 129)",
      "popup_text": "rgb(233, 229, 227)",
      "button_background_active": "rgb(100, 121, 110)",
      "button_background_hover": "rgb(100, 121, 110)",
      "ntp_background": "rgb(100, 121, 110)",
      "ntp_text": "rgb(233, 229, 227)",
      "popup_border": "rgb(100, 121, 110)",
      "popup_highlight_text": "rgb(233, 229, 227)",
      "popup_highlight": "rgb(100, 121, 110)",
      "sidebar_border": "rgb(100, 121, 110)",
      "sidebar_highlight_text": "rgb(233, 229, 227)",
      "sidebar_highlight": "rgb(100, 121, 110)",
      "sidebar_text": "rgb(39, 68, 66)",
      "sidebar": "rgb(116, 142, 129)",
      "tab_loading": "rgb(233, 229, 227)",
      "tab_selected": "rgb(116, 142, 129)",
      "tab_text": "rgb(233, 229, 227)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{48be71b2-3ded-4d7c-b841-1de5e2e27421}"
    }
  }
}