[1. Blue] 들판이 푸르다. The field is green/ 푸른 하늘 blue sky
[2. not ripen] 푸른 보리 not ripen barley/ 푸른 과일 not ripen fruit
[3. authority is dignified] 푸른 양반 confident aristocrat / 기세가 푸르다 the power is dignified /
[4. young] 푸른 시절 young age (term)
[5. Hope, Aspiration is big] 푸른 꿈
[6. Air is fresh] 푸른 공기
[7. cold, chilly] 푸른 목소리
Given the abundance of greens in a human diet, I would be more grossed out if my soup were blue instead. Blue is a relatively rare color on the dining table, save for artificially colored desserts.