Examine source code of Colorblind Assist

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "ColorblindAssist",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(174, 194, 170)",
      "toolbar_text": "rgb(239, 255, 2)",
      "frame": "rgb(52, 57, 60)",
      "tab_background_text": "rgb(104, 208, 208)",
      "toolbar_field": "rgb(40, 49, 56)",
      "toolbar_field_text": "rgb(241, 226, 0)",
      "tab_line": "rgb(151, 169, 117)",
      "popup": "rgb(160, 252, 155)",
      "popup_text": "rgba(96, 99, 150, 0.81)",
      "button_background_active": "rgb(243, 243, 227)",
      "button_background_hover": "rgb(0, 246, 254)",
      "frame_inactive": "rgb(7, 0, 247)",
      "icons_attention": "rgb(185, 254, 0)",
      "icons": "rgba(5, 0, 220, 0.79)",
      "ntp_background": "rgb(86, 119, 93)",
      "ntp_text": "rgba(111, 5, 5, 0.79)",
      "popup_border": "rgb(94, 86, 119)",
      "popup_highlight_text": "rgba(133, 104, 104, 0.79)",
      "popup_highlight": "rgb(60, 21, 182)",
      "sidebar_border": "rgba(255, 2, 2, 0.79)",
      "sidebar_highlight_text": "rgb(138, 182, 21)",
      "sidebar_highlight": "rgb(91, 5, 111)",
      "sidebar_text": "rgb(151, 169, 117)",
      "tab_loading": "rgb(151, 169, 117)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fe1020c8-15ea-428c-b3fb-a7c46c7be1ab}"
    }
  }
}