Examine source code of Coastal Colors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Coastal Colors",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-013-06591d4ad28ab7b9ee90f62f81d6b505.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(91, 123, 123)",
      "toolbar_text": "rgb(238, 238, 221)",
      "frame": "rgb(42, 61, 64)",
      "tab_background_text": "rgb(238, 238, 221)",
      "toolbar_field": "rgb(64, 89, 89)",
      "toolbar_field_text": "rgb(238, 238, 221)",
      "tab_line": "rgb(154, 167, 167)",
      "popup": "rgb(64, 85, 99)",
      "popup_text": "rgb(238, 238, 221)",
      "icons_attention": "rgb(239, 239, 160)",
      "ntp_background": "rgb(64, 89, 89)",
      "popup_border": "rgb(154, 167, 167)",
      "sidebar_text": "rgb(208, 226, 226)",
      "sidebar": "rgb(64, 85, 99)",
      "tab_selected": "rgb(64, 85, 99)",
      "tab_loading": "rgb(154, 167, 167)"
    }
  }
}