On a yellow square edged with a 1/8 inch (.32 cm) blue border wavy, an inner concentric narrow blue border between the wavy inscriptions "HIDALGO" at top and "HIGH SCHOOL" at bottom in blue letters. Overall a yellow "pirate" face affronté detailed black and white wearing a black hat and surmounting a pair of cutlasses in saltire, blades white, hilts black. The overall dimensions are 3 1/4 inches (8.26 cm) in height by 3 inches (7.62 cm) in width.
Blue and white are the school colors. The mascot is the pirate. The shape of the shield denotes a flag waving in the air. The pirate with crossed sables signifies the "Jolly Roger," the symbol of the pirate flag and ship.
The shoulder sleeve insignia was approved 10 October 1996.