Color

#40495e

#40495e
hex#40495e
rgbrgb(64, 73, 94)
hslhsl(222, 19%, 31%)
oklchoklch(0.406 0.037 266.7)
Closest name: Bonne Nuit (#3a4866)Relative luminance 0.0666

Colors that go with #40495e

Steel Blue, Blue and Blush Pink 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 →

#5e5540

#40585e · #46405e

#5e4049 · #495e40

Split-complementary

Open in tool →

#5e4640 · #585e40

#5e4058 · #5e5540 · #405e46

Contrast

#40495e as textRatioAAAA largeAAAFix
Aaon white
9:1passpasspassPasses AAA — no fix needed.
Aaon black
2.33:1failfailfail
  • AA: use #677698 as the text (4.62:1)
  • AAA: use #8c97b1 as the text (7.18:1)
  • AA: or shift the background to #b8b8b8 (4.54:1)
  • AAA: or shift the background to #e3e3e3 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40495e as the background.

Brands using this color

mcpConnect your agent — build around #40495e
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 #40495e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40495e-9ca3c4-df6e4e-211f2d-e9eff1?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