Color

#181b35

#181b35
hex#181b35
rgbrgb(24, 27, 53)
hslhsl(234, 38%, 15%)
oklchoklch(0.234 0.05 276.8)
Closest name: Dark Knight (#151931)Relative luminance 0.0124

Tints & shades

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

Harmonies

Complementary

Open in tool →

#353218

#182935 · #231835

#35181b · #1b3518

Split-complementary

Open in tool →

#352318 · #293518

#351829 · #353218 · #183523

Contrast

#181b35 as textRatioAAAA largeAAAFix
Aaon white
16.84:1passpasspassPasses AAA — no fix needed.
Aaon black
1.25:1failfailfail
  • AA: use #6870bb as the text (4.62:1)
  • AAA: use #8b91cb as the text (7.01:1)
  • AA: or shift the background to #858585 (4.56:1)
  • AAA: or shift the background to #a8a8a8 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #181b35 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

#181b35 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #181b35
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 #181b35 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/181b35-9d9cc4-df8a4e-241f2d-e9eef1?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