Color

#421001

#421001
hex#421001
rgbrgb(66, 16, 1)
hslhsl(14, 97%, 13%)
oklchoklch(0.257 0.081 38.3)
Closest name: Black Chocolate (#441100)Relative luminance 0.0153

Colors that go with #421001

Charcoal, Crimson and Royal Blue 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 →

#013241

#410112 · #413001

#014110 · #100141

Split-complementary

Open in tool →

#014130 · #011241

#124101 · #013241 · #300141

Contrast

#421001 as textRatioAAAA largeAAAFix
Aaon white
16.08:1passpasspassPasses AAA — no fix needed.
Aaon black
1.31:1failfailfail
  • AA: use #dd3603 as the text (4.6:1)
  • AAA: use #fc6436 as the text (7.02:1)
  • AA: or shift the background to #8a8a8a (4.66:1)
  • AAA: or shift the background to #ababab (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #421001 as the background.

Brands using this color

Fonts for this mood

#421001 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #421001
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 #421001 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/421001-c4aa9c-62cbb1-2d291f-f1e9eb?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