Examine source code of Color Theory

{
  "manifest_version": 2,
  "name": "Color Theory",
  "version": "0.9",
  "description": "An extension to help with choosing colors.",
  "homepage_url": "https://github.com/missu/colortheory-extension",
  "icons": {
    "48": "icons/logo-48.PNG",
    "96": "icons/logo-96.PNG"
  },
  "permissions": [
    "activeTab"
  ],
  "sidebar_action": {
    "default_icon": "icons/logo-48.PNG",
    "default_title": "Color theory",
    "default_panel": "sidebar/index.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "MacCtrl+Shift+L"
      },
      "description": "Opens the Color Theory extension"
    }
  }
}