Color

#09235d

#09235d
hex#09235d
rgbrgb(9, 35, 93)
hslhsl(221, 82%, 20%)
oklchoklch(0.279 0.109 263)
Closest name: Black Sea Night (#052462)Relative luminance 0.0205

Colors that go with #09235d

Charcoal, Slate Blue and Steel Blue 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 →

#5d4209

#094d5d · #19095d

#5d0924 · #245d09

Split-complementary

Open in tool →

#5d1909 · #4d5d09

#5d094d · #5d4209 · #095d19

Contrast

#09235d as textRatioAAAA largeAAAFix
Aaon white
14.89:1passpasspassPasses AAA — no fix needed.
Aaon black
1.41:1failfailfail
  • AA: use #336deb as the text (4.53:1)
  • AAA: use #6a95f0 as the text (7.17:1)
  • AA: or shift the background to #8f8f8f (4.61:1)
  • AAA: or shift the background to #b3b3b3 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #09235d as the background.

Brands using this color

Fonts for this mood

#09235d reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #09235d
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 #09235d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/09235d-9ca4c4-df6b4e-211f2d-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