Color

#37394e

#37394e
hex#37394e
rgbrgb(55, 57, 78)
hslhsl(235, 17%, 26%)
oklchoklch(0.352 0.037 280.1)
Closest name: Call It a Night (#42364c)Relative luminance 0.0429

Colors that go with #37394e

Dark Olive Green, Steel Blue and Teal lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#4e4c37

#37444e · #40374e

#4e3739 · #394e37

Split-complementary

Open in tool →

#4e4037 · #444e37

#4e3744 · #4e4c37 · #374e40

Contrast

#37394e as textRatioAAAA largeAAAFix
Aaon white
11.3:1passpasspassPasses AAA — no fix needed.
Aaon black
1.86:1failfailfail
  • AA: use #707399 as the text (4.6:1)
  • AAA: use #9193b1 as the text (7.01:1)
  • AA: or shift the background to #a6a6a6 (4.64:1)
  • AAA: or shift the background to #cccccc (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #37394e as the background.

Brands using this color

Fonts for this mood

#37394e reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #37394e
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #37394e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/37394e-9e9cc4-df8d4e-241f2d-e9eef1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md