Color

#646a39

#646a39
hex#646a39
rgbrgb(100, 106, 57)
hslhsl(67, 30%, 32%)
oklchoklch(0.507 0.071 114.7)
Closest name: Bancha (#666a47)Relative luminance 0.1331

Colors that go with #646a39

Charcoal, Royal Blue and Slate 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.

Real palettes that use #646a39

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f396a

#6a5739 · #4c6a39

#39646a · #6a3964

Split-complementary

Open in tool →

#394c6a · #57396a

#396a57 · #3f396a · #6a394c

Contrast

#646a39 as textRatioAAAA largeAAAFix
Aaon white
5.73:1passpassfail
  • AAA: use #555a30 as the text (7.26:1)
Aaon black
3.66:1failpassfail
  • AA: use #747b42 as the text (4.65:1)
  • AAA: use #939c54 as the text (7.12:1)
  • AA: or shift the background to #e6e6e6 (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #646a39 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

mcpConnect your agent — build around #646a39
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 #646a39 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/646a39-b8bea2-4e83df-262d1f-f1eee9?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