Color

#421010

#421010
hex#421010
rgbrgb(66, 16, 16)
hslhsl(0, 61%, 16%)
oklchoklch(0.26 0.077 24.3)
Closest name: English Breakfast (#441111)Relative luminance 0.0157

Colors that go with #421010

Charcoal, Royal Blue and Sienna 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 #421010

Tints & shades

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

Harmonies

Complementary

Open in tool →

#104242

#421029 · #422910

#104210 · #101042

Split-complementary

Open in tool →

#104229 · #102942

#294210 · #104242 · #291042

Contrast

#421010 as textRatioAAAA largeAAAFix
Aaon white
15.99:1passpasspassPasses AAA — no fix needed.
Aaon black
1.31:1failfailfail
  • AA: use #d14242 as the text (4.57:1)
  • AAA: use #de7878 as the text (7.06:1)
  • AA: or shift the background to #8a8a8a (4.63:1)
  • AAA: or shift the background to #adadad (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #421010 as the background.

Brands using this color

Fonts for this mood

#421010 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #421010
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 #421010 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/421010-c4a19c-62cb98-2d251f-f1e9ed?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