Color

#09377b

#09377b
hex#09377b
rgbrgb(9, 55, 123)
hslhsl(216, 86%, 26%)
oklchoklch(0.353 0.125 259.2)
Closest name: Below the Surface (#0a2f7c)Relative luminance 0.0422

Colors that go with #09377b

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 →

#7b4e09

#09707b · #15097b

#7b0937 · #377b09

Split-complementary

Open in tool →

#7b1509 · #707b09

#7b0970 · #7b4e09 · #097b15

Contrast

#09377b as textRatioAAAA largeAAAFix
Aaon white
11.39:1passpasspassPasses AAA — no fix needed.
Aaon black
1.84:1failfailfail
  • AA: use #1b70ee as the text (4.6:1)
  • AAA: use #5996f3 as the text (7.08:1)
  • AA: or shift the background to #a3a3a3 (4.51:1)
  • AAA: or shift the background to #cccccc (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #09377b as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#09377b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #09377b
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 #09377b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/09377b-9ca7c4-df5f4e-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