青い (aoi) means "blue." This い-adjective describes the color blue, like the sky or the sea. Interestingly, in Japanese, it can sometimes refer to green for things like fresh produce or traffic lights. For example, "青い空がきれいです。" (Aoi sora ga kirei desu.) means "The blue sky is beautiful."

「青い(あおい)」は空(そら)や海(うみ)のような色(いろ)。例：青い(あおい)空(そら)。