Color

#641b59

#641b59
hex#641b59
rgbrgb(100, 27, 89)
hslhsl(309, 57%, 25%)
oklchoklch(0.365 0.129 334.6)
Closest name: Cosmic Explorer (#551155)Relative luminance 0.0421

Colors that go with #641b59

Sea Green, Cream and Denim 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 →

#1b6426

#4b1b64 · #641b35

#59641b · #1b5964

Split-complementary

Open in tool →

#35641b · #1b644b

#644b1b · #1b6426 · #1b3564

Contrast

#641b59 as textRatioAAAA largeAAAFix
Aaon white
11.4:1passpasspassPasses AAA — no fix needed.
Aaon black
1.84:1failfailfail
  • AA: use #c837b2 as the text (4.65:1)
  • AAA: use #d86fc8 as the text (7.03:1)
  • AA: or shift the background to #a3a3a3 (4.52:1)
  • AAA: or shift the background to #cccccc (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #641b59 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

#641b59 reads as warm, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #641b59
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 #641b59 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/641b59-c19fb8-85cb62-2d1f25-eee9f1?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