Examine source code of Black Mirum

{
  "name": "Black Mirum",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "HD.png"
    },
    "colors": {
      "frame": "rgba(59, 59, 59, 1)",
      "tab_background_text": "rgba(224, 224, 224, 1)",
      "toolbar": "rgba(59, 59, 59, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(232, 232, 232, 1)",
      "toolbar_field_text": "rgba(26, 26, 26, 1)",
      "tab_line": "rgba(66, 66, 66, 1)"
    }
  }
}