Examine source code of astronaut light theme

{
  "name": "astronaut light theme",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "firefox_themeLight.svg"
    },
    "colors": {
      "frame": "rgba(219, 219, 219, 1)",
      "tab_background_text": "rgba(99, 99, 99, 1)",
      "toolbar": "rgba(240, 240, 240, 1)",
      "bookmark_text": "rgba(41, 41, 41, 1)",
      "toolbar_field": "rgba(255, 234, 112, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}