Color

#40424f

#40424f
hex#40424f
rgbrgb(64, 66, 79)
hslhsl(232, 10%, 28%)
oklchoklch(0.382 0.022 278.4)
Closest name: Arsenic (#3b444b)Relative luminance 0.0555

Colors that go with #40424f

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 #40424f

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4f4d40

#40494f · #45404f

#4f4042 · #424f40

Split-complementary

Open in tool →

#4f4540 · #494f40

#4f4049 · #4f4d40 · #404f45

Contrast

#40424f as textRatioAAAA largeAAAFix
Aaon white
9.95:1passpasspassPasses AAA — no fix needed.
Aaon black
2.11:1failfailfail
  • AA: use #707489 as the text (4.55:1)
  • AAA: use #9294a5 as the text (7:1)
  • AA: or shift the background to #b0b0b0 (4.59:1)
  • AAA: or shift the background to #d9d9d9 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40424f 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

#40424f reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40424f
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 #40424f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40424f-9c9dc4-df864e-231f2d-e9eef1?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