In touch-color synesthesia the skin reports to the eyes: denim has a color that arrives on contact, smooth glass another, deep pressure another still. Documented cases show the usual synesthetic signature of specificity and lifelong stability.
The direction is the reverse of auditory-tactile synesthesia, where sound produces body sensation, and the pair make a tidy illustration that synesthetic links run modality to modality in either direction depending on the person. Like most of the rarer forms, it is known mainly from case studies.