Trophocosta cyanoxantha is a species of moth of the family Tortricidae.

It is endemic to Sri Lanka.

The forewings are orange, strigulated with darker and suffused with fuscous except towards the costa and termen.

There are two spots at the base and four angulated transverse series of about four rounded leaden-blue-metallic spots each, alternating with some small blackish tufts.

There are also some pale golden metallic dots on the posterior half of the costa and termen.