Examine source code of Cobalt 2

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Cobalt2",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(30, 59, 86)",
      "toolbar_field": "rgb(14, 28, 40)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(250, 184, 30)",
      "popup": "rgb(30, 59, 86)",
      "popup_text": "rgb(201, 204, 212)",
      "tab_loading": "rgb(250, 184, 30)",
      "bookmark_text": "rgb(255, 255, 255)",
      "frame": "rgb(14, 28, 40)",
      "tab_background_text": "rgb(201, 204, 212)"
    }
  }
}