HL7 Terminology (THO)
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This page is part of the HL7 Terminology (v7.2.0: Release) based on FHIR (HL7® FHIR® Standard) v5.0.0. This is the current published version. For a full list of available versions, see the Directory of published versions

RGB Values for Color Metadata Record

Metadata Record Information Version 20260630
Maintained By HL7 Terminology Services Management Group (TSMG)
Last Updated Date 30 June 2026
Responsible Organizations World Wide Web Consortium (W3C) Roles
  • Code System Owner
  • Code System Maintainer (Steward)
  • Code System Publisher
Website https://www.w3.org/TR/css-color-4/#numeric-srgb
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Code System Names Formal name RGB Values for Color
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Code System Technical Identifiers Identification Record
TSMG-endorsed URI http://terminology.hl7.org/CodeSystem/color-rgb
TSMG-endorsed OID 2.16.840.1.113883.4.642.4.2121
Code System Information Links CSS Color Module Level 4
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 enumerate the 16 million+ valid RGB codes (terminology servers will need code to support the RGB grammar). Per the CSS Color Module Level 4 specification, this is a compositional code system.
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Versions of the RGB color syntax are governed by the W3C CSS Color Module specification.
Code System Copyright, Intellectual Property and Licensing Copyright Statement
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