Examine source code of Minimalist Contrast

{
  "theme": {
    "images": {
      "theme_frame": "contrast_persona.png"
    },
    "colors": {
      "frame": "#474747",
      "tab_background_text": "#e6e6e6"
    }
  },
  "version": "2.0",
  "name": "Minimalist Contrast",
  "manifest_version": 2,
  "description": "Designed with the right hand options ( ex. Web Developer Plug In ) in mind. Easy contrast to view all buttons and text. Pleasing to the eyes as well."
}