Examine source code of Greyish Red

{
  "name": "Greyish Red",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "13578100514_fac86e07cc_k.jpg"
    },
    "colors": {
      "frame": "rgba(79, 79, 79, 1)",
      "tab_background_text": "rgba(186, 186, 186, 1)",
      "toolbar": "rgba(186, 186, 186, 1)",
      "bookmark_text": "rgba(232, 72, 72, 1)",
      "toolbar_field": "rgba(186, 186, 186, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}