Examine source code of True Dark Low Contrast

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "True Dark Low Contrast",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(33, 35, 33)",
      "toolbar_text": "rgb(138, 140, 138)",
      "frame": "rgb(33, 35, 33)",
      "tab_background_text": "rgb(108, 110, 108)",
      "toolbar_field": "rgb(28, 30, 28)",
      "toolbar_field_text": "rgb(138, 140, 138)",
      "tab_line": "rgba(138, 140, 138, 0.1)",
      "popup": "rgb(33, 35, 33)",
      "popup_text": "rgb(138, 140, 138)",
      "ntp_background": "rgb(33, 35, 33)",
      "popup_border": "rgba(34, 25, 77, 0)",
      "popup_highlight_text": "rgb(138, 140, 138)",
      "popup_highlight": "rgb(33, 35, 33)",
      "toolbar_bottom_separator": "rgba(103, 105, 103, 0.5)",
      "toolbar_field_border_focus": "rgba(103, 105, 103, 0.35)",
      "tab_loading": "rgba(138, 140, 138, 0.1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d78a0612-3089-4efe-9431-df27f7fdb022}"
    }
  }
}