Examine source code of Project Warlock

{
  "name": "Project Warlock",
  "manifest_version": 2,
  "version": "1.1",
  "theme": {
    "images": {
      "theme_frame": "project-warlock.jpg"
    },
    "colors": {
      "frame": "rgba(17, 25, 32, 1)",
      "tab_background_text": "rgba(153, 153, 153, 1)",
      "toolbar": "rgba(112, 112, 112, 0.21)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(54, 79, 97, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}