Hey, love the idea! For that super‑quiet vibe in bright colors, start with a dark base like charcoal or midnight blue—keeps the silhouette tight. Then pop a single, almost‑hidden accent color (think neon green or electric purple) only in the edges or a subtle glow. Keep the interior empty or use tiny pixel‑dashes for texture, so the eye doesn’t get distracted. Dithering the edges can give a soft blur that feels “shh,” and just a hint of a light source behind the silhouette will make it look like a silent shadow sliding through neon night. Play with the palette, but remember: the less you show, the louder the mystery screams!