Examine source code of simply blue

{
  "manifest_version": 2,
  "version": "1.1.1",
  "name": "simply blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-020-48c286b34e53380d46803c2e5603a5b2.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 1)",
      "toolbar_text": "rgba(100,200,300, 1)",
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(100,200,300, 1)",
      "tab_line": "rgba(100,200,300, 0)",
      "popup": "rgba(0, 0, 0, 1)",
      "popup_text": "rgba(100,200,300,1)",
      "icons_attention": "rgba(194, 171, 255,1)",
      "icons": "rgba(100,200,300,1)",
      "ntp_background": "rgba(0, 0, 0,1)",
      "ntp_text": "rgba(100,200,300,1)",
      "popup_highlight_text": "rgba(100,200,300, 1)",
      "popup_highlight": "rgba(100,200,300, 0.50)",
      "sidebar_border": "rgba(100,200,300,1)",
      "sidebar_highlight_text": "rgba(100,200,300, 0.50)",
      "sidebar_text": "rgba(100,200,300,1)",
      "sidebar": "rgba(0, 0, 0,1)",
      "tab_background_separator": "rgba(255, 255, 255,1)",
      "tab_selected": "rgba(100,200,300,1)",
      "tab_text": "rgba(255, 255, 255,1)",
      "toolbar_bottom_separator": "rgba(100,200,300, 0)",
      "toolbar_field_border_focus": "rgba(0, 0, 0, 0)",
      "toolbar_field_border": "rgba(100,200,300,1)",
      "toolbar_field_focus": "rgba(0, 0, 0,1)",
      "toolbar_field_highlight_text": "rgba(255, 255, 255,1)",
      "toolbar_field_highlight": "rgba(100,200,300, 0.50)",
      "toolbar_field_text_focus": "rgba(100,200,300,1)",
      "toolbar_top_separator": "rgba(100,200,300, 0)",
      "tab_loading": "rgba(100,200,300, 0)"
    }
  }
}