Color

#1b372b

#1b372b
hex#1b372b
rgbrgb(27, 55, 43)
hslhsl(154, 34%, 16%)
oklchoklch(0.31 0.041 164.5)
Closest name: Aztec (#293432)Relative luminance 0.0314

Colors that go with #1b372b

Sea Green, Sienna and Slate Blue 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 →

#371b27

#1b371d · #1b3537

#2b1b37 · #372b1b

Split-complementary

Open in tool →

#371b35 · #371d1b

#1d1b37 · #371b27 · #35371b

Contrast

#1b372b as textRatioAAAA largeAAAFix
Aaon white
12.9:1passpasspassPasses AAA — no fix needed.
Aaon black
1.63:1failfailfail
  • AA: use #408265 as the text (4.6:1)
  • AAA: use #52a783 as the text (7.21:1)
  • AA: or shift the background to #999999 (4.53:1)
  • AAA: or shift the background to #bfbfbf (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b372b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1b372b reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b372b
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 #1b372b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b372b-a2beb5-d459ca-1f2d2d-e9f1ea?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