Color

#3b495e

#3b495e
hex#3b495e
rgbrgb(59, 73, 94)
hslhsl(216, 23%, 30%)
oklchoklch(0.402 0.04 258.3)
Closest name: Bonne Nuit (#3a4866)Relative luminance 0.065

Colors that go with #3b495e

Teal, Sienna and 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 →

#5e503b

#3b5b5e · #3e3b5e

#5e3b49 · #495e3b

Split-complementary

Open in tool →

#5e3e3b · #5b5e3b

#5e3b5b · #5e503b · #3b5e3e

Contrast

#3b495e as textRatioAAAA largeAAAFix
Aaon white
9.13:1passpasspassPasses AAA — no fix needed.
Aaon black
2.3:1failfailfail
  • AA: use #60779a as the text (4.6:1)
  • AAA: use #8597b2 as the text (7.07:1)
  • AA: or shift the background to #b8b8b8 (4.6:1)
  • AAA: or shift the background to #e3e3e3 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3b495e as the background.

Brands using this color

Fonts for this mood

#3b495e reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3b495e
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 #3b495e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3b495e-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