Examine source code of Walkman

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Walkman",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(85, 90, 90)",
      "toolbar_text": "rgb(0, 255, 137)",
      "frame": "rgb(159, 172, 153)",
      "tab_background_text": "rgb(50, 67, 78)",
      "toolbar_field": "rgb(25, 44, 56)",
      "toolbar_field_text": "rgb(95, 229, 241)",
      "tab_line": "rgba(128, 121, 121, 0)",
      "popup": "rgb(251, 255, 91)",
      "popup_text": "rgb(33, 142, 107)",
      "button_background_active": "rgb(0, 0, 0)",
      "button_background_hover": "rgb(112, 124, 107)",
      "frame_inactive": "rgb(133, 142, 134)",
      "icons_attention": "rgb(0, 255, 137)",
      "icons": "rgb(251, 255, 91)",
      "ntp_background": "rgb(212, 255, 133)",
      "ntp_text": "rgb(50, 67, 78)",
      "popup_border": "rgba(0, 0, 0, 0)",
      "popup_highlight_text": "rgb(50, 67, 78)",
      "popup_highlight": "rgb(251, 255, 91)",
      "sidebar_border": "rgba(0, 0, 0, 0)",
      "sidebar_highlight": "rgb(95, 229, 241)",
      "sidebar_text": "rgb(25, 44, 56)",
      "tab_loading": "rgba(128, 121, 121, 0)"
    }
  }
}