Examine source code of BLACKHACK

{
  "name": "BLACK",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "32508.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(0, 255, 196, 0.55)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(4, 214, 207, 0.75)",
      "toolbar_field": "rgba(0, 0, 0, 0.64)",
      "toolbar_field_text": "rgba(9, 52, 224, 1)",
      "tab_line": "rgba(9, 129, 240, 0.55)"
    }
  }
}