Color

#391d2b

#391d2b
hex#391d2b
rgbrgb(57, 29, 43)
hslhsl(330, 33%, 17%)
oklchoklch(0.274 0.049 349.4)
Closest name: Black-Hearted (#3e1825)Relative luminance 0.0192

Colors that go with #391d2b

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 →

#1d3a2b

#3a1d3a · #3a1d1d

#2b3a1d · #1d2b3a

Split-complementary

Open in tool →

#1d3a1d · #1d3a3a

#3a3a1d · #1d3a2b · #1d1d3a

Contrast

#391d2b as textRatioAAAA largeAAAFix
Aaon white
15.17:1passpasspassPasses AAA — no fix needed.
Aaon black
1.38:1failfailfail
  • AA: use #ad5c85 as the text (4.65:1)
  • AAA: use #c185a3 as the text (7.15:1)
  • AA: or shift the background to #8c8c8c (4.51:1)
  • AAA: or shift the background to #b3b3b3 (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #391d2b 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

#391d2b reads as warm, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #391d2b
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 #391d2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/391d2b-c49cab-62cb64-2d1f20-f1e9f1?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