Color

#403d4c

#403d4c
hex#403d4c
rgbrgb(64, 61, 76)
hslhsl(252, 11%, 27%)
oklchoklch(0.369 0.026 294.3)
Closest name: Call It a Night (#42364c)Relative luminance 0.0495

Colors that go with #403d4c

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 #403d4c

Tints & shades

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

Harmonies

Complementary

Open in tool →

#494c3d

#3d424c · #483d4c

#4c403d · #3d4c40

Split-complementary

Open in tool →

#4c483d · #424c3d

#4c3d42 · #494c3d · #3d4c48

Contrast

#403d4c as textRatioAAAA largeAAAFix
Aaon white
10.55:1passpasspassPasses AAA — no fix needed.
Aaon black
1.99:1failfailfail
  • AA: use #77718e as the text (4.54:1)
  • AAA: use #9893a9 as the text (7.08:1)
  • AA: or shift the background to #ababab (4.6:1)
  • AAA: or shift the background to #d4d4d4 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #403d4c 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

#403d4c reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #403d4c
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 #403d4c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/403d4c-a99cc4-dfb64e-281f2d-e9ecf1?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