src/vs/editor/standalone/browser/standaloneThemeService.ts/StandaloneTheme/getColors
class StandaloneTheme:	private getColors(): Map<string, Color> {
		if (!this.colors) {
			const colors = new Map<string, Color>();
			for (const id in this.themeData.colors) {
				colors.set(id, Color.fromHex(this.themeData.colors[id]));
			}
			if (this.themeData.inherit) {
				const baseData = getBuiltinRules(this.themeData.base);
				for (const id in baseData.colors) {
					if (!colors.has(id)) {
						colors.set(id, Color.fromHex(baseData.colors[id]));
					}
				}
			}
			this.colors = colors;
		}
		return this.colors;
	}