The Tantrasara describes her iconography: Bagalamukhi sits inside of a golden throne in the midst of the ocean within an altar. Her complexion is yellow (golden). Clad in yellow dresses, she is adorned by a garland of yellow flowers and decked with yellow (golden) ornaments. The answer is to some degree counterintuitive: https://www.instagram.com/p/DJihOs8oj2v/