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Source1

{
  "resourceType": "NamingSystem",
  "id": "color-rgb",
  "text": {
    "status": "generated",
    "div": "<!-- snip (see above) -->"
  },
  "url": "http://terminology.hl7.org/NamingSystem/color-rgb",
  "version": "20260630",
  "name": "ColorRGB",
  "title": "RGB Values for Color",
  "status": "active",
  "kind": "codesystem",
  "date": "2026-06-08T00:00:00-00:00",
  "publisher": "World Wide Web Consortium (W3C)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "https://www.w3.org/"
        }
      ]
    }
  ],
  "responsible": "World Wide Web Consortium (W3C)",
  "description": "RGB values for color. Valid codes are #RRGGBB where RR, GG, and BB are two letter hex codes, values 00..ff. Codes are case insensitive. This code system does not define the 16 million+ valid RGB codes (terminology servers will need code to support the RGB grammar).",
  "copyright": "[Copyright](https://www.w3.org/copyright/software-license-2023/) ©2026 World Wide Web Consortium. W3C® liability, trademark and permissive document license rules apply.",
  "uniqueId": [
    {
      "type": "uri",
      "value": "http://terminology.hl7.org/CodeSystem/color-rgb",
      "preferred": true
    },
    {
      "type": "oid",
      "value": "2.16.840.1.113883.4.642.4.2121",
      "preferred": true
    },
    {
      "type": "uri",
      "value": "http://hl7.org/fhir/color-rgb",
      "comment": "The URI for this code system when it was published as part of the FHIR core specification."
    }
  ]
}