Examine source code of forest colors

{
  "name": "forest colors",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screen Shot 2021-01-12 at 12.54.41 PM.png"
    },
    "colors": {
      "frame": "rgba(67, 79, 20, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(190, 199, 159, 1)",
      "bookmark_text": "rgba(74, 51, 42, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)"
    }
  }
}