Color

#663e1a

#663e1a
hex#663e1a
rgbrgb(102, 62, 26)
hslhsl(28, 59%, 25%)
oklchoklch(0.404 0.075 59.9)
Closest name: Brown (#653700)Relative luminance 0.0634

Colors that go with #663e1a

Copper, Hunter Green and Sage 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.

Real palettes that use #663e1a

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1a4265

#651a1d · #65631a

#1a653d · #3d1a65

Split-complementary

Open in tool →

#1a6563 · #1a1d65

#1d651a · #1a4265 · #631a65

Contrast

#663e1a as textRatioAAAA largeAAAFix
Aaon white
9.26:1passpasspassPasses AAA — no fix needed.
Aaon black
2.27:1failfailfail
  • AA: use #aa672c as the text (4.69:1)
  • AAA: use #cf8544 as the text (7.09:1)
  • AA: or shift the background to #b5b5b5 (4.51:1)
  • AAA: or shift the background to #e0e0e0 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #663e1a as the background.

Brands using this color

Fonts for this mood

#663e1a reads as warm, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #663e1a
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 #663e1a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/663e1a-c4b39c-62cbc9-2d2c1f-f1e9ea?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