Examine source code of Snufkin colour theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Snufkin",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(1, 60, 1)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(64, 125, 45)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(181, 212, 195)",
      "tab_line": "rgb(96, 194, 115)",
      "popup": "rgb(1, 23, 11)",
      "popup_text": "rgb(82, 223, 112)",
      "ntp_background": "rgb(54, 54, 99)",
      "popup_highlight": "rgb(17, 12, 45)",
      "sidebar_highlight_text": "rgb(6, 3, 25)",
      "tab_loading": "rgb(96, 194, 115)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2a8847af-6f91-4cba-936c-aa6307a1c8e4}"
    }
  }
}