The combination of these three colors is common, and pink represents cherry blossoms as the sign of spring, white represents snow to express passing winter and green represents Yomogi as an early sign of summer.
この3色の組合せが一般的で桜色は桜を表わして春の息吹きを、白は雪で冬の名残りを、緑はヨモギで夏への予兆を表現している。