青出于蓝而胜于蓝 (青出於藍而勝於藍) qīng chūyú lán ér shèng yú lán

qīng chūyú lán ér shèng yú lán phrase the color blue is made out of indigo but is more vivid than indigo
Domain: Proverb 谚语
Notes: (CC-CEDICT '青出於藍而勝於藍')