Color

#09398b

#09398b
hex#09398b
rgbrgb(9, 57, 139)
hslhsl(218, 88%, 29%)
oklchoklch(0.371 0.145 260.9)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0485

Colors that go with #09398b

Charcoal, Crimson 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 →

#8b5b09

#097a8b · #1a098b

#8b0939 · #398b09

Split-complementary

Open in tool →

#8b1a09 · #7a8b09

#8b097a · #8b5b09 · #098b1a

Contrast

#09398b as textRatioAAAA largeAAAFix
Aaon white
10.66:1passpasspassPasses AAA — no fix needed.
Aaon black
1.97:1failfailfail
  • AA: use #226ef1 as the text (4.57:1)
  • AAA: use #5c94f5 as the text (7.01:1)
  • AA: or shift the background to #ababab (4.64:1)
  • AAA: or shift the background to #d4d4d4 (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #09398b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#09398b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #09398b
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 #09398b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/09398b-9ca6c4-df644e-201f2d-e9f0f1?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