Examine source code of starmatt

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "starmatt",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(33, 38, 44)",
      "toolbar_text": "rgb(231, 236, 239)",
      "frame": "rgb(22, 26, 29)",
      "tab_background_text": "rgb(231, 236, 239)",
      "toolbar_field": "rgb(65, 77, 88)",
      "toolbar_field_text": "rgb(231, 236, 239)",
      "tab_line": "rgb(89, 137, 235)",
      "popup": "rgb(65, 77, 88)",
      "popup_text": "rgb(231, 236, 239)",
      "button_background_active": "rgb(89, 137, 235)",
      "button_background_hover": "rgb(65, 77, 88)",
      "frame_inactive": "rgb(33, 38, 44)",
      "ntp_background": "rgb(22, 26, 29)",
      "ntp_text": "rgb(231, 236, 239)",
      "popup_border": "rgb(33, 38, 44)",
      "sidebar_border": "rgb(65, 77, 88)",
      "sidebar_highlight_text": "rgb(231, 236, 239)",
      "sidebar_highlight": "rgb(65, 77, 88)",
      "sidebar_text": "rgb(231, 236, 239)",
      "sidebar": "rgb(22, 26, 29)",
      "toolbar_field_border_focus": "rgb(89, 137, 235)",
      "toolbar_field_border": "rgb(65, 77, 88)",
      "toolbar_field_focus": "rgb(65, 77, 88)",
      "tab_loading": "rgb(89, 137, 235)"
    }
  }
}