Color

#666f01

#666f01
hex#666f01
rgbrgb(102, 111, 1)
hslhsl(65, 98%, 22%)
oklchoklch(0.516 0.117 115.2)
Closest name: darkolivegreen (#556b2f)Relative luminance 0.142

Colors that go with #666f01

Charcoal, Blue and Champagne 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 #666f01

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0a016f

#6f4101 · #2f6f01

#01666f · #6f0166

Split-complementary

Open in tool →

#012f6f · #41016f

#016f41 · #0a016f · #6f012f

Contrast

#666f01 as textRatioAAAA largeAAAFix
Aaon white
5.47:1passpassfail
  • AAA: use #535b01 as the text (7.33:1)
Aaon black
3.84:1failpassfail
  • AA: use #747e01 as the text (4.73:1)
  • AAA: use #909d02 as the text (7.01:1)
  • AA: or shift the background to #ebebeb (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 #666f01 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

#666f01 reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #666f01
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 #666f01 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/666f01-b8bea2-4e88df-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