Color

#42170b

#42170b
hex#42170b
rgbrgb(66, 23, 11)
hslhsl(13, 71%, 15%)
oklchoklch(0.269 0.07 36.4)
Closest name: Black Chocolate (#441100)Relative luminance 0.018

Colors that go with #42170b

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 →

#0b3641

#410b1a · #41320b

#0b4117 · #170b41

Split-complementary

Open in tool →

#0b4132 · #0b1a41

#1a410b · #0b3641 · #320b41

Contrast

#42170b as textRatioAAAA largeAAAFix
Aaon white
15.45:1passpasspassPasses AAA — no fix needed.
Aaon black
1.36:1failfailfail
  • AA: use #cd4823 as the text (4.55:1)
  • AAA: use #e37759 as the text (7.05:1)
  • AA: or shift the background to #8c8c8c (4.6:1)
  • AAA: or shift the background to #b0b0b0 (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 #42170b as the background.

Brands using this color

Fonts for this mood

#42170b reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #42170b
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 #42170b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42170b-c4a99c-62cbaf-2d281f-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