Examine source code of Aractus Dark

{
  "name": "Aractus Dark",
  "manifest_version": 2,
  "version": "1.0",
  "description": "Dark theme by Aractus.",
  "theme": {
    "colors": {
      "bookmark_text": "rgb(249,249,250)",
      "button_background_active": "hsla(0,0%,70%,.6)",
      "button_background_hover": "hsla(0,0%,70%,.4)",
      "frame": "hsl(235,33%,19%)",
      "frame_inactive": "rgb(42,42,44)",
      "icons": "rgba(249,249,250,.7)",
      "icons_attention": "#45a1ff",
      "ntp_background": "rgba(42,42,46,1)",
      "ntp_text": "rgba(249,249,250,.8)",
      "popup": "rgb(75,75,77)",
      "popup_border": "rgb(39,39,42)",
      "popup_highlight": "Highlight",
      "popup_highlight_text": "HighlightText",
      "popup_text": "rgb(249,249,250)",
      "sidebar": "rgb(75,75,77)",
      "sidebar_border": "rgb(39,39,42)",
      "sidebar_highlight": "Highlight",
      "sidebar_highlight_text": "HighlightText",
      "sidebar_text": "rgb(249,249,250)",
      "tab_background_separator": "rgb(249,249,250)",
      "tab_background_text": "rgb(249,249,250)",
      "tab_line": "rgb(10,132,255)",
      "tab_selected": "rgb(60,60,62)",
      "tab_text": "white",
      "toolbar": "rgb(60,60,62)",
      "toolbar_bottom_separator": "rgb(50,50,52)",
      "toolbar_field": "rgb(71,71,73)",
      "toolbar_field_border": "rgba(249,249,250,.15)",
      "toolbar_field_border_focus": "Highlight",
      "toolbar_field_focus": "rgb(71,71,73)",
      "toolbar_field_highlight": "Highlight",
      "toolbar_field_highlight_text": "white",
      "toolbar_field_separator": "rgba(249,249,250,.15)",
      "toolbar_field_text": "rgb(249,249,250)",
      "toolbar_field_text_focus": "rgb(249,249,250)",
      "toolbar_top_separator": "rgb(30,30,34)",
      "toolbar_vertical_separator": "rgba(249,249,250,.15)"
    }
  }
}