Examine source code of Dark Yellow

{
  "name": "Dark Yellow",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "2f2f2f-1440x900.png"
    },
    "colors": {
      "frame": "rgba(26, 21, 21, 1)",
      "tab_background_text": "rgba(230, 159, 5, 1)",
      "toolbar": "rgba(31, 24, 24, 1)",
      "bookmark_text": "rgba(230, 159, 5, 1)",
      "toolbar_field": "rgba(43, 35, 35, 1)",
      "toolbar_field_text": "rgba(230, 159, 5, 1)"
    }
  }
}