Color

#421f27

#421f27
hex#421f27
rgbrgb(66, 31, 39)
hslhsl(346, 36%, 19%)
oklchoklch(0.291 0.055 6.5)
Closest name: Castro (#44232f)Relative luminance 0.0228

Colors that go with #421f27

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 →

#1f423a

#421f39 · #42281f

#27421f · #1f2742

Split-complementary

Open in tool →

#1f4228 · #1f3942

#39421f · #1f423a · #281f42

Contrast

#421f27 as textRatioAAAA largeAAAFix
Aaon white
14.41:1passpasspassPasses AAA — no fix needed.
Aaon black
1.46:1failfailfail
  • AA: use #b1596d as the text (4.52:1)
  • AAA: use #c68695 as the text (7.25:1)
  • AA: or shift the background to #919191 (4.57:1)
  • AAA: or shift the background to #b5b5b5 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #421f27 as the background.

Brands using this color

Fonts for this mood

#421f27 reads as warm, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #421f27
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 #421f27 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/421f27-c49ca1-62cb80-2d221f-f1e9ef?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