Color

#181c2b

#181c2b
hex#181c2b
rgbrgb(24, 28, 43)
hslhsl(227, 28%, 13%)
oklchoklch(0.23 0.03 272.4)
Closest name: Dark Knight (#151931)Relative luminance 0.012

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2a2618

#18252a · #1d182a

#2a181c · #1c2a18

Split-complementary

Open in tool →

#2a1d18 · #252a18

#2a1825 · #2a2618 · #182a1d

Contrast

#181c2b as textRatioAAAA largeAAAFix
Aaon white
16.94:1passpasspassPasses AAA — no fix needed.
Aaon black
1.24:1failfailfail
  • AA: use #6674a9 as the text (4.64:1)
  • AAA: use #8995bd as the text (7.1:1)
  • AA: or shift the background to #858585 (4.59:1)
  • AAA: or shift the background to #a8a8a8 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #181c2b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#181c2b reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #181c2b
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 #181c2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/181c2b-9ca0c4-df7a4e-221f2d-e9eff1?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