阿彌陀經通贊疏 2.37

2.37

贊曰：此後二文，第三顏色、四香潔。四色各有異光也。光即光彩各異。微妙者，深細殊常。香者香氣，潔者體無塵垢，故云微妙香潔。《清淨經》云：一一華葉皆作異寶色。何獨青色光等也？經據純色者說。

The Commentary says: These are the latter two passages: third, the colors; fourth, the fragrance and purity. The four colors each have their distinct light. 'Light' refers to radiance, each different. 'Subtle and wondrous' means profound, fine, and extraordinary. 'Fragrant' refers to fragrance; 'pure' means that their substance is free of dust and defilement. Hence it says 'subtle, wondrous, fragrant, and pure'. The Qingjing jing says: each flower and leaf takes on the color of a different jewel. Why are only blue light and the others mentioned? The sūtra speaks in terms of the pure colors.