Examine source code of yellowgrey

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "yellowgrey",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(38, 38, 36)",
      "toolbar_text": "rgba(193, 193, 125, 0.87)",
      "frame": "rgb(205, 205, 172)",
      "tab_background_text": "rgb(255, 255, 185)",
      "toolbar_field": "rgba(78, 76, 64, 0.97)",
      "toolbar_field_text": "rgb(237, 237, 178)",
      "tab_line": "rgb(235, 235, 18)",
      "popup": "rgba(38, 38, 36, 0.86)",
      "popup_text": "rgb(205, 205, 172)",
      "button_background_active": "rgb(221, 211, 138)",
      "button_background_hover": "rgba(108, 108, 11, 0.82)",
      "frame_inactive": "rgb(222, 197, 16)",
      "icons_attention": "rgb(75, 75, 49)",
      "icons": "rgb(231, 207, 30)",
      "ntp_background": "rgb(55, 55, 54)",
      "ntp_text": "rgb(217, 213, 180)",
      "popup_border": "rgba(243, 243, 13, 0.61)",
      "popup_highlight_text": "rgba(255, 255, 185, 0.82)",
      "popup_highlight": "rgba(197, 197, 30, 0.58)",
      "sidebar_border": "rgba(243, 243, 13, 0.61)",
      "sidebar_highlight_text": "rgba(240, 240, 15, 0.5)",
      "sidebar_highlight": "rgba(222, 222, 77, 0.61)",
      "sidebar_text": "rgb(236, 236, 183)",
      "sidebar": "rgb(59, 59, 53)",
      "tab_background_separator": "rgb(228, 228, 13)",
      "tab_loading": "rgb(217, 217, 17)",
      "tab_selected": "rgba(143, 143, 131, 0)",
      "tab_text": "rgb(235, 235, 18)",
      "toolbar_bottom_separator": "rgb(180, 180, 108)",
      "toolbar_field_border_focus": "rgb(244, 244, 13)",
      "toolbar_field_border": "rgb(209, 209, 39)",
      "toolbar_field_highlight_text": "rgb(232, 232, 181)",
      "toolbar_field_highlight": "rgb(126, 8, 72)",
      "toolbar_field_separator": "rgb(191, 191, 144)",
      "toolbar_top_separator": "rgb(203, 203, 3)"
    }
  }
}