Similar to a feather shown here (right column): https://www.featheremporium.com/Exotic-Feathers/peafowl/india-blue.html

Not the same bird, but still interesting: "Biomechanics of the Peacock’s Display: How Feather Structure and Resonance Influence Multimodal Signaling” at https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0152759