#303b39 - Rookwood Shutter Green color

A very dark, muted teal-green leaning toward cool slate blue. It reads almost black at small scales, revealing subtle green-blue undertones in better light. The tone feels calm, sophisticated, and slightly moody — reminiscent of deep forest shadows, weathered patina, or stormy coastal waters. Excellent for grounding palettes, elegant UI backgrounds, and understated accents where depth and neutrality are desired without the starkness of pure black.