Color

#421f3a

#421f3a
hex#421f3a
rgbrgb(66, 31, 58)
hslhsl(314, 36%, 19%)
oklchoklch(0.299 0.067 336.4)
Closest name: Blackberry (#43182f)Relative luminance 0.0244

Colors that go with #421f3a

Charcoal, Dark Olive Green and Sea Green 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 →

#1f4227

#391f42 · #421f28

#3a421f · #1f3a42

Split-complementary

Open in tool →

#28421f · #1f4239

#42391f · #1f4227 · #1f2842

Contrast

#421f3a as textRatioAAAA largeAAAFix
Aaon white
14.11:1passpasspassPasses AAA — no fix needed.
Aaon black
1.49:1failfailfail
  • AA: use #af559a as the text (4.59:1)
  • AAA: use #c37fb3 as the text (7.01:1)
  • AA: or shift the background to #949494 (4.65:1)
  • AAA: or shift the background to #b8b8b8 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #421f3a 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

#421f3a reads as warm, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #421f3a
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 #421f3a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/421f3a-c19fb5-7ccb62-2d1f24-efe9f1?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