Color

#3f424a

#3f424a
hex#3f424a
rgbrgb(63, 66, 74)
hslhsl(224, 8%, 27%)
oklchoklch(0.379 0.014 269.3)
Closest name: Arsenic (#3b444b)Relative luminance 0.0545

Colors that go with #3f424a

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 #3f424a

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4a473f

#3f484a · #423f4a

#4a3f42 · #424a3f

Split-complementary

Open in tool →

#4a423f · #484a3f

#4a3f48 · #4a473f · #3f4a42

Contrast

#3f424a as textRatioAAAA largeAAAFix
Aaon white
10.05:1passpasspassPasses AAA — no fix needed.
Aaon black
2.09:1failfailfail
  • AA: use #717684 as the text (4.63:1)
  • AAA: use #9195a1 as the text (7.02:1)
  • AA: or shift the background to #b0b0b0 (4.63:1)
  • AAA: or shift the background to #d9d9d9 (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 #3f424a 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

#3f424a reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3f424a
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 #3f424a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f424a-9ca2c4-df724e-221f2d-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