Color

#183a2f

#183a2f
hex#183a2f
rgbrgb(24, 58, 47)
hslhsl(161, 41%, 16%)
oklchoklch(0.319 0.045 169.9)
Closest name: Botanical Night (#12403c)Relative luminance 0.0343

Colors that go with #183a2f

Sea Green, Sienna 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 →

#3a1823

#183a1e · #18333a

#2f183a · #3a2f18

Split-complementary

Open in tool →

#3a1833 · #3a1e18

#1e183a · #3a1823 · #333a18

Contrast

#183a2f as textRatioAAAA largeAAAFix
Aaon white
12.46:1passpasspassPasses AAA — no fix needed.
Aaon black
1.69:1failfailfail
  • AA: use #36816a as the text (4.51:1)
  • AAA: use #47a98a as the text (7.31:1)
  • AA: or shift the background to #9c9c9c (4.54:1)
  • AAA: or shift the background to #c4c4c4 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #183a2f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#183a2f reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #183a2f
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 #183a2f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/183a2f-a2beb8-d459bb-1f2c2d-e9f1eb?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