Examine source code of japenese dark core

{
  "name": "japenese dark core",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "twitter header japanenese aesthetics.jpg"
    },
    "colors": {
      "frame": "rgba(48, 44, 41, 0.66)",
      "tab_background_text": "rgba(24, 26, 41, 1)",
      "toolbar": "rgba(33, 37, 51, 0.63)",
      "bookmark_text": "rgba(19, 21, 26, 1)",
      "toolbar_field": "rgba(102, 0, 0, 0.07)",
      "toolbar_field_text": "rgba(36, 36, 43, 1)",
      "tab_line": "rgba(76, 100, 145, 1)"
    }
  }
}