Color

#18455d

#18455d
hex#18455d
rgbrgb(24, 69, 93)
hslhsl(201, 59%, 23%)
oklchoklch(0.371 0.064 235.6)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0524

Colors that go with #18455d

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 →

#5d3018

#185d53 · #18225d

#5d1845 · #455d18

Split-complementary

Open in tool →

#5d1822 · #5d5318

#53185d · #5d3018 · #225d18

Contrast

#18455d as textRatioAAAA largeAAAFix
Aaon white
10.25:1passpasspassPasses AAA — no fix needed.
Aaon black
2.05:1failfailfail
  • AA: use #2c7eaa as the text (4.67:1)
  • AAA: use #449ecf as the text (7.04:1)
  • AA: or shift the background to #adadad (4.57:1)
  • AAA: or shift the background to #d6d6d6 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #18455d as the background.

Brands using this color

Fonts for this mood

#18455d reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #18455d
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 #18455d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/18455d-9cb1c4-df4e62-1f222d-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