The Taste of an Idea

Mostard started as a joke—a riff on “mustard,” of course, but also a spicy nod to something hotter, brighter, and unapologetically bold. It had to be yellow. It had to be loud. And above all, it had to feel like something that could only exist in a world where guitar tone meets diner counter culture.
Thomas and I kept circling back to the idea of where you’d actually find a jar of Mostard. It wasn’t in a fridge—it was in a dusty glass jar, glowing next to a bottle of Texas hot sauce, somewhere on a chipped Formica counter. And the diner? It was straight out of From Dusk Till Dawn —Tarantino’s cult classic that blends Americana, grit, and a sudden, feral bite. That desert dive bar, neon flickering, air thick with heat and tension—that’s the world Mostard belongs in.
A Diner on a Pedal
The goal was to capture that full Americana dreamscape, with just enough weirdness to make it unmistakably RhPf.
The background is a rich mustard yellow that blooms from a soft center and darkens as it pushes outward, like something warming under heat lamps. In the center sits the diner itself—classic 1950s chrome and neon, with a checkerboard floor, vinyl booths, and a glowing jukebox in the corner. The building stands proud but worn, like it’s been there forever, surviving on coffee, riffs, and the occasional fistfight.
It’s nostalgic, but not cliché. Familiar, but slightly off. Just like the Titty Twister—if it served burgers and tone instead of tequila and trouble.
Flavor, Not Flash
We didn’t want the design to scream mustard joke. We wanted it to feel like a place that would sell Mostard. A made-up sauce with real heat.
Everything in the illustration has a little extra saturation, like a memory or a dream. The red signage pops with energy. The chrome lines reflect that dusty desert light. And if you look closely, the glowing details echo the circuit’s voicing—bright and biting, never flat or dull.
The visual language matches the sonic intent: punchy, focused, and full of character.
Drenched in Character
Mostard’s design doesn’t just rely on the joke—it builds on it. This isn’t a gimmick. It’s a love letter to flavor, tone, and the strange beauty of places that live in the corners of pop culture. Just like the circuit it wraps, the design balances warmth with bite, nostalgia with clarity, and simplicity with just a touch of menace.
We hope it brings a smile before the first note’s even played.
Stay tuned for more RhPf Electronics Behind the Scenes!
Want to read more like the Mostard Graphic Design? go to our Behind the Scenes series on our subreddit.