Examine source code of Dark Blue Green theme

{
  "name": "Dark Blue Green theme",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "770395.jpg"
    },
    "colors": {
      "frame": "rgba(33, 40, 54, 1)",
      "tab_background_text": "rgba(202, 207, 230, 1)",
      "toolbar": "rgba(13, 27, 56, 1)",
      "bookmark_text": "rgba(33, 138, 100, 1)",
      "toolbar_field": "rgba(30, 51, 82, 1)",
      "toolbar_field_text": "rgba(223, 232, 237, 1)",
      "tab_line": "rgba(33, 138, 100, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a42f6b9f-8beb-417b-896d-2a97dcab0188}"
    }
  }
}