src/vs/platform/theme/common/tokenClassificationRegistry.ts/getStylingSchemeEntry
function getStylingSchemeEntry(description?: string, deprecationMessage?: string): IJSONSchema {
	return {
		description,
		deprecationMessage,
		defaultSnippets: [{ body: '${1:#ff0000}' }],
		anyOf: [
			{
				type: 'string',
				format: 'color-hex'
			},
			{
				$ref: '#/definitions/style'
			}
		]
	};
}