Examine source code of chill theme

{
  "name": "Plum theme ",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "5e62747cf1fee664feb22581.png"
    },
    "colors": {
      "frame": "rgba(145, 152, 255, 1)",
      "tab_background_text": "rgba(110, 89, 194, 1)",
      "toolbar": "rgba(136, 108, 184, 1)",
      "bookmark_text": "rgba(54, 0, 148, 0.39)",
      "toolbar_field": "rgba(128, 75, 153, 1)",
      "toolbar_field_text": "rgba(220, 181, 255, 1)"
    }
  }
}