Examine source code of Lines v2

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Lines v2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(234, 235, 246, 0)",
      "toolbar_text": "rgb(218, 47, 230)",
      "frame": "rgb(220, 185, 242)",
      "tab_background_text": "rgb(194, 246, 249)",
      "toolbar_field": "rgba(241, 207, 245, 0.7)",
      "toolbar_field_text": "rgb(88, 12, 163)",
      "tab_line": "rgba(220, 185, 242, 0.7)",
      "popup": "rgba(220, 185, 242, 0.7)",
      "popup_text": "rgb(153, 51, 255)",
      "button_background_active": "rgba(241, 207, 245, 0.7)",
      "ntp_background": "rgb(231, 214, 248)",
      "popup_border": "rgb(153, 51, 255)",
      "sidebar_border": "rgb(218, 47, 230)",
      "sidebar_text": "rgb(153, 51, 255)",
      "sidebar": "rgb(224, 248, 248)",
      "tab_selected": "rgba(220, 185, 242, 0.5)",
      "toolbar_bottom_separator": "rgb(88, 12, 163)",
      "toolbar_field_border_focus": "rgb(88, 12, 163)",
      "toolbar_field_border": "rgb(153, 51, 255)",
      "toolbar_field_focus": "rgb(220, 197, 243)",
      "toolbar_field_highlight": "rgb(153, 51, 255)",
      "toolbar_field_text_focus": "rgb(88, 12, 163)",
      "tab_loading": "rgba(220, 185, 242, 0.7)"
    }
  }
}