Color

#366b91

#366b91
hex#366b91
rgbrgb(54, 107, 145)
hslhsl(205, 46%, 39%)
oklchoklch(0.508 0.083 242)
Closest name: Chill of the Night (#256d8d)Relative luminance 0.1334

Colors that go with #366b91

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 →

#915c36

#36918a · #363d91

#91366b · #6b9136

Split-complementary

Open in tool →

#91363d · #918a36

#8a3691 · #915c36 · #3d9136

Contrast

#366b91 as textRatioAAAA largeAAAFix
Aaon white
5.72:1passpassfail
  • AAA: use #2f5d7f as the text (7.02:1)
Aaon black
3.67:1failpassfail
  • AA: use #3e7ca8 as the text (4.65:1)
  • AAA: use #639cc5 as the text (7.09:1)
  • AA: or shift the background to #e6e6e6 (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #366b91 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#366b91 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #366b91
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 #366b91 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/366b91-9cafc4-df4e58-1f212d-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