Examine source code of kool theme

{
  "name": "kool theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "fondo.png"
    },
    "colors": {
      "frame": "rgba(64, 111, 214, 1)",
      "tab_background_text": "rgba(201, 167, 167, 1)",
      "toolbar": "rgba(204, 55, 55, 1)",
      "bookmark_text": "rgba(189, 90, 189, 1)",
      "toolbar_field": "rgba(74, 145, 80, 1)",
      "toolbar_field_text": "rgba(255, 0, 0, 1)",
      "tab_line": "rgba(255, 0, 0, 1)"
    }
  }
}