Color

#366887

#366887
hex#366887
rgbrgb(54, 104, 135)
hslhsl(203, 43%, 37%)
oklchoklch(0.496 0.073 237.9)
Closest name: Chill of the Night (#256d8d)Relative luminance 0.1243

Colors that go with #366887

Charcoal, Royal Blue 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 →

#875536

#36877d · #363f87

#873668 · #688736

Split-complementary

Open in tool →

#87363f · #877d36

#7d3687 · #875536 · #3f8736

Contrast

#366887 as textRatioAAAA largeAAAFix
Aaon white
6.02:1passpassfail
  • AAA: use #305d78 as the text (7.09:1)
Aaon black
3.49:1failpassfail
  • AA: use #407ba0 as the text (4.56:1)
  • AAA: use #629cc0 as the text (7.04:1)
  • AA: or shift the background to #e0e0e0 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #366887 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#366887 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #366887
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 #366887 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/366887-9cb0c4-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