Color

#183f3d

#183f3d
hex#183f3d
rgbrgb(24, 63, 61)
hslhsl(177, 45%, 17%)
oklchoklch(0.339 0.044 190.7)
Closest name: Botanical Night (#12403c)Relative luminance 0.0409

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f181a

#183f29 · #182d3f

#3d183f · #3f3d18

Split-complementary

Open in tool →

#3f182d · #3f2918

#29183f · #3f181a · #2d3f18

Contrast

#183f3d as textRatioAAAA largeAAAFix
Aaon white
11.56:1passpasspassPasses AAA — no fix needed.
Aaon black
1.82:1failfailfail
  • AA: use #31817d as the text (4.57:1)
  • AAA: use #3fa6a1 as the text (7.18:1)
  • AA: or shift the background to #a3a3a3 (4.58:1)
  • AAA: or shift the background to #cccccc (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #183f3d as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#183f3d reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #183f3d
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

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

analyze #183f3d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/183f3d-a2bcbe-d4599b-1f282d-e9f1ed?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