Looking flash isn’t a substitute for cash.

Suave New York bespoke suit designer Fred Castleberry was jailed in Texas recently after he refused to appear in court to settle charges with his ex over $400,000 in unpaid child support, her lawyer claims.

Disagreeing with his F.E. Castleberry brand’smotto — “The better you dress, the worse you can behave” — a Parker County judge found him in contempt and ordered the Creative Director’s arrest in October, documents obtained by The Post show.