Examine source code of Simple_Blue_gray

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Simple_Blue_gray",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(95, 107, 119)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(9, 114, 143)",
      "tab_background_text": "rgb(219, 223, 200)",
      "toolbar_field": "rgb(219, 223, 200)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(156, 158, 143)",
      "popup": "rgb(105, 109, 113)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(31, 138, 168)",
      "button_background_hover": "rgb(71, 157, 181)",
      "frame_inactive": "rgb(9, 114, 143)",
      "icons_attention": "rgb(18, 169, 141)",
      "icons": "rgb(48, 215, 184)",
      "ntp_background": "rgb(95, 107, 119)",
      "popup_border": "rgb(219, 223, 200)",
      "tab_selected": "rgb(95, 107, 119)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(219, 223, 200)",
      "tab_loading": "rgb(156, 158, 143)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9ef8577b-fcae-4101-bf59-422d1e93dbf2}"
    }
  }
}