Color

#40434a

#40434a
hex#40434a
rgbrgb(64, 67, 74)
hslhsl(222, 7%, 27%)
oklchoklch(0.383 0.013 267.2)
Closest name: Arsenic (#3b444b)Relative luminance 0.056

Colors that go with #40434a

Blue, Blush Pink and Burlywood 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.

Real palettes that use #40434a

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#4a4740

#40484a · #42404a

#4a4043 · #434a40

Split-complementary

Open in tool →

#4a4240 · #484a40

#4a4048 · #4a4740 · #404a42

Contrast

#40434a as textRatioAAAA largeAAAFix
Aaon white
9.91:1passpasspassPasses AAA — no fix needed.
Aaon black
2.12:1failfailfail
  • AA: use #727783 as the text (4.68:1)
  • AAA: use #9296a0 as the text (7.09:1)
  • AA: or shift the background to #b0b0b0 (4.57:1)
  • AAA: or shift the background to #d9d9d9 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40434a 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

#40434a reads as neutral, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40434a
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 #40434a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40434a-a2beb0-c859d4-1f2d2b-eaf1e9?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