Examine source code of Dark Blue Ocean

{
  "name": "Dark Blue Ocean",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "ucsc_rocket_team.png"
    },
    "colors": {
      "frame": "rgba(22, 26, 35, 1)",
      "tab_background_text": "rgba(89, 175, 175, 1)",
      "toolbar": "rgba(22, 26, 35, 1)",
      "bookmark_text": "rgba(224, 255, 255, 1)",
      "toolbar_field": "rgba(224, 255, 255, 1)",
      "toolbar_field_text": "rgba(22, 26, 35, 1)"
    }
  }
}