description: This extension enables an insurance company to provide a background color to be used by consuming applications when they render the information found on an insurance card for the insurance plan member. When rendering foreground and background colors, the implementer SHOULD not use the same foreground and background colors and instead should algorithmically determine a high color contrast. package_name: hl7.fhir.us.insurance derivation: constraint name: BackgroundColor type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/insurance-card/StructureDefinition/C4DIC-BackgroundColor-extension'} index: 1 value: choices: [valueCodeableConcept] index: 3 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4} package_version: card-1.1.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/insurance-card/StructureDefinition/C4DIC-BackgroundColor-extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.1.0 required: [value, valueCodeableConcept]