Color

#181f2a

#181f2a
hex#181f2a
rgbrgb(24, 31, 42)
hslhsl(217, 27%, 13%)
oklchoklch(0.238 0.024 259.3)
Closest name: Dark (#1b2431)Relative luminance 0.0134

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2a2318

#18282a · #1a182a

#2a181f · #1f2a18

Split-complementary

Open in tool →

#2a1a18 · #282a18

#2a1828 · #2a2318 · #182a1a

Contrast

#181f2a as textRatioAAAA largeAAAFix
Aaon white
16.56:1passpasspassPasses AAA — no fix needed.
Aaon black
1.27:1failfailfail
  • AA: use #5d77a2 as the text (4.63:1)
  • AAA: use #8498b8 as the text (7.16:1)
  • AA: or shift the background to #878787 (4.61:1)
  • AAA: or shift the background to #ababab (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #181f2a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#181f2a reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #181f2a
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 #181f2a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/181f2a-9ca7c4-df624e-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