Examine source code of Aphex Twin grey theme

{
  "name": "Aphex Twin grey theme",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Aphex Twin persona.png"
    },
    "colors": {
      "frame": "rgba(66, 66, 66, 1)",
      "tab_background_text": "rgba(230, 230, 230, 1)",
      "toolbar": "rgba(255, 255, 255, 0.08)",
      "bookmark_text": "rgba(255, 255, 255, 0.79)",
      "toolbar_field": "rgba(99, 99, 99, 1)",
      "toolbar_field_text": "rgba(230, 230, 230, 1)"
    }
  }
}