All of the references to Amitabha Buddha below are as secondary figures in mandalas. All of the forms of Amitabha has peaceful deity appearance, with long hair, jewels and heavenly garments. In most cases he appears red in colour. Two of the examples belonging to the Paramadya Tantra are gold in colour.
Charya Tantra (Conduct):
Toh 479. The Compendium of Realities. དེ་ཁོ་ན་ཉིད་བསྡུས་པ། · de kho na nyid bsdus pa. tattvasaṃgraha.