Color

#18394e

#18394e
hex#18394e
rgbrgb(24, 57, 78)
hslhsl(203, 53%, 20%)
oklchoklch(0.33 0.054 239.2)
Closest name: Astral Nomad (#203943)Relative luminance 0.0367

Colors that go with #18394e

Royal Blue, Teal and Sienna lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4e2d18

#184e48 · #181e4e

#4e1839 · #394e18

Split-complementary

Open in tool →

#4e181e · #4e4818

#48184e · #4e2d18 · #1e4e18

Contrast

#18394e as textRatioAAAA largeAAAFix
Aaon white
12.11:1passpasspassPasses AAA — no fix needed.
Aaon black
1.73:1failfailfail
  • AA: use #347ba8 as the text (4.54:1)
  • AAA: use #539dca as the text (7.04:1)
  • AA: or shift the background to #9e9e9e (4.52:1)
  • AAA: or shift the background to #c7c7c7 (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #18394e as the background.

Brands using this color

Fonts for this mood

#18394e reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #18394e
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

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

analyze #18394e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/18394e-9cb0c4-df4e5d-1f222d-e9f1f0?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