-----------------------------------
青い, 蒼い, 碧い, あおい
1. blue, azure
2. green
3. pale (facial color), gray, grey
4. unripe, inexperienced
蓝色,天蓝色
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题;表示与另一选项(无论是否明确提及)形成对比;表示强调