Examine source code of red-dirty

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "red-dirty",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(212, 212, 212, 0)",
      "toolbar_text": "rgb(230, 230, 230)",
      "frame": "rgb(42, 42, 46)",
      "tab_background_text": "rgb(229, 229, 229)",
      "toolbar_field": "rgb(42, 42, 46)",
      "toolbar_field_text": "rgb(245, 245, 245)",
      "tab_line": "rgb(198, 15, 19)",
      "popup": "rgb(42, 42, 46)",
      "popup_text": "rgb(230, 230, 230)",
      "button_background_active": "rgba(198, 15, 19, 0.88)",
      "button_background_hover": "rgba(255, 255, 255, 0.39)",
      "icons_attention": "rgb(198, 15, 19)",
      "icons": "rgb(249, 249, 249)",
      "ntp_background": "rgb(42, 42, 46)",
      "popup_border": "rgb(198, 15, 19)",
      "popup_highlight_text": "rgb(198, 15, 19)",
      "popup_highlight": "rgb(198, 15, 19)",
      "sidebar_border": "rgb(198, 15, 19)",
      "sidebar_highlight_text": "rgb(198, 15, 19)",
      "sidebar_text": "rgb(230, 230, 230)",
      "sidebar": "rgb(42, 42, 46)",
      "tab_loading": "rgb(255, 0, 7)",
      "tab_selected": "rgba(255, 255, 255, 0.31)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(198, 15, 19)",
      "toolbar_field_border_focus": "rgb(198, 15, 19)",
      "toolbar_field_border": "rgb(198, 15, 19)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)"
    }
  }
}