Examine source code of Thunder Theme

{
  "name": "Thunder Theme",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Thunder Theme png.png"
    },
    "colors": {
      "toolbar": "rgba(120, 120, 120, 0.47)",
      "toolbar_field": "rgba(176, 176, 176, 0)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 0.51)",
      "bookmark_text": "rgba(125, 188, 255, 0.51)"
    }
  }
}