That's why, the recurring use with the colour yellow in Bagalamukhi rituals and iconography is symbolic. It represents her powers to grant victory around enemies, bestow wealth and prosperity, and supply spiritual wisdom into the devotee. This is amongst the boons for which Bagalamukhi's devotees worship her. Other Mahavidya goddesses https://www.youtube.com/watch?v=5VeSyP9JRw0