The Tri-Ferg is Palace Skateboards' instantly recognizable logo: a Penrose triangle (an impossible optical illusion) with the word 'PALACE' incorporated into each side. The logo was designed by Fergus Purcell, a British graphic designer and artist, with the name combining 'triangle' and 'Ferg' (Fergus). The Tri-Ferg has become one of streetwear's most iconic symbols, representing Palace's irreverent British identity and design-forward approach. The optical illusion nature of the Penrose triangle—appearing three-dimensional but geometrically impossible—reflects Palace's playful approach to branding and fashion. The logo appears across Palace's products in countless variations, colors, and interpretations while remaining immediately identifiable. Like Supreme's box logo, the Tri-Ferg has achieved cultural significance beyond its function as a brand identifier, becoming a symbol of London streetwear and skate culture globally.