Examine source code of Blue + light blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "computer",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(9, 15, 43)",
      "toolbar_text": "rgb(149, 201, 255)",
      "frame": "rgb(0, 18, 38)",
      "tab_background_text": "rgb(105, 173, 244)",
      "toolbar_field": "rgb(12, 21, 60)",
      "toolbar_field_text": "rgb(143, 206, 245)",
      "tab_line": "rgb(0, 234, 255)",
      "popup": "rgb(1, 10, 47)",
      "popup_text": "rgb(0, 234, 255)",
      "ntp_background": "rgb(9, 15, 43)",
      "ntp_text": "rgb(149, 201, 255)",
      "popup_border": "rgb(0, 234, 255)",
      "tab_text": "rgb(170, 216, 255)",
      "tab_loading": "rgb(0, 234, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5f71b86c-c44c-449f-8431-03f063cd7f19}"
    }
  }
}