src/vs/editor/common/languages/supports/tokenization.ts/generateTokensCSSForColorMap
export function generateTokensCSSForColorMap(colorMap: readonly Color[]): string {
	const rules: string[] = [];
	for (let i = 1, len = colorMap.length; i < len; i++) {
		const color = colorMap[i];
		rules[i] = `.mtk${i} { color: ${color}; }`;
	}
	rules.push('.mtki { font-style: italic; }');
	rules.push('.mtkb { font-weight: bold; }');
	rules.push('.mtku { text-decoration: underline; text-underline-position: under; }');
	rules.push('.mtks { text-decoration: line-through; }');
	rules.push('.mtks.mtku { text-decoration: underline line-through; text-underline-position: under; }');
	return rules.join('\n');
}