Color Picker - RGB/Hex colour code

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Color Picker - RGB/Hex colour code",
  "version": "2.0",
  "description": "Color Picker allows you to pick and find colour code (RGB/Hexadecimal). Advanced Eyedropper & Gradient Generator",
  "default_locale": "en",
  "background": {
    "page": "html/background.html"
  },
  "options_page": "html/options.html",
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "browser_action": {
    "default_icon": "images/main-icon-19.png",
    "default_title": "Color Picker",
    "default_popup": "html/popup.html"
  },
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "css/content-style.css",
    "images/checkmark-icon.png"
  ]
}