Examine source code of Theme Flamengo

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_TEMPLATE.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Theme Flamengo",
  "manifest_version": 2,
  "description": "This is the persona of my favorite soccer team! The best team in Brazil, Development also by: Marvio Rocha - <a href=\"https://outgoing.prod.mozaws.net/v1/08f480a0aeb1c79075f8bda65e2c89efef0463b16012de7692320799df920664/http%3A//www.marviorocha.com\" rel=\"nofollow\">www.marviorocha.com</a>"
}