ChromaWell

Stormy Sky Palette

The green-gray light right before a thunderstorm breaks — heavy, low-saturation, one warning note.

#2C3639

storm-cloud dark teal-gray

HSL 194° 13% 20%

12.4:1 on white

#3F4E4F

cloud gray-green

HSL 184° 11% 28%

8.7:1 on white

#A27B5C

warning-light tan

HSL 27° 28% 50%

3.8:1 on white

#DCD7C9

pale storm-light

HSL 44° 21% 83%

1.4:1 on white

#1B1B1B

near-black ground

HSL 0° 0% 11%

17.2:1 on white

Using this palette

The gray-greens here (#2C3639, #3F4E4F) are trying to capture a specific real phenomenon — the sickly green-gray cast the sky takes on under severe storm cells — rather than a generic 'moody gray.' #A27B5C, a warm tan, is included as the sliver of warm light that breaks through storm clouds low on the horizon, and it's the only non-cool tone in the set; use it sparingly as a single accent, not a fill. #1B1B1B provides real black for grounding text or UI chrome. Fits dramatic editorial, outdoor/adventure, or dark-academia-adjacent branding; too heavy and low-key for anything that needs to feel light or inviting.