PHILADELPHIA — Disgruntled delegates who backed Bernie Sanders plan to show their dissatisfaction with the Democratic National Convention when Hillary Clinton delivers her acceptance speech.

Sanders delegates attending Thursday’s convention were sporting neon yellow shirts with the words “Enough is enough — Bernie Sanders,” printed in blue. The shirts glow in the dark and are aimed at sending a message to DNC officials, and especially Clinton, that despite the festive atmosphere at the last night of the convention, they are unhappy with the direction of the party.