Scripture calls it discernment
Synesthesia involves cross-activation between sensory and cognitive processing areas, resulting in enhanced pattern recognition across domains. Cytowic, R.E., & Eagleman, D.M. (2009). Wednesday Is Indigo Blue. MIT Press. — Scripture: 1 Corinthians 12:10 — discernment as a genuine perceptual and spiritual capacity; Hebrews 5:14 — discernment described as trained perception, the ability to distinguish what others miss. Both framings describe the same functional reality.