Color

#181f2b

#181f2b
hex#181f2b
rgbrgb(24, 31, 43)
hslhsl(218, 28%, 13%)
oklchoklch(0.238 0.025 261)
Closest name: Dark (#1b2431)Relative luminance 0.0135

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2a2418

#18282a · #1a182a

#2a181f · #1f2a18

Split-complementary

Open in tool →

#2a1a18 · #282a18

#2a1828 · #2a2418 · #182a1a

Contrast

#181f2b as textRatioAAAA largeAAAFix
Aaon white
16.54:1passpasspassPasses AAA — no fix needed.
Aaon black
1.27:1failfailfail
  • AA: use #5c76a3 as the text (4.58:1)
  • AAA: use #8397b9 as the text (7.09:1)
  • AA: or shift the background to #878787 (4.6:1)
  • AAA: or shift the background to #ababab (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 #181f2b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#181f2b reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #181f2b
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 #181f2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/181f2b-9ca6c4-df644e-201f2d-e9f0f1?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