Examine source code of Material Atmosphere

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "atmosphere",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgba(23, 23, 23, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(90, 0, 255)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(58, 0, 165)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(90, 0, 255)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgba(0, 0, 0, 0.21)",
      "button_background_hover": "rgba(0, 0, 0, 0.09)",
      "popup_border": "rgba(255, 0, 0, 0)",
      "popup_highlight": "rgba(0, 0, 0, 0.21)",
      "sidebar_border": "rgba(255, 255, 255, 0)",
      "tab_selected": "rgba(255, 255, 255, 0)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgba(0, 0, 0, 0)",
      "toolbar_field_border": "rgba(0, 0, 0, 0)",
      "toolbar_field_focus": "rgb(58, 0, 165)",
      "toolbar_field_highlight": "rgb(90, 0, 255)",
      "toolbar_top_separator": "rgba(255, 255, 255, 0)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{302bf316-e54d-49dc-88cd-7d40543395c5}"
    }
  }
}