Color

#666a15

#666a15
hex#666a15
rgbrgb(102, 106, 21)
hslhsl(63, 67%, 25%)
oklchoklch(0.505 0.103 112.3)
Closest name: darkolivegreen (#556b2f)Relative luminance 0.1319

Colors that go with #666a15

Charcoal, Blue Violet and 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 #666a15

Tints & shades

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

Harmonies

Complementary

Open in tool →

#19156a

#6a4415 · #3b6a15

#15666a · #6a1566

Split-complementary

Open in tool →

#153b6a · #44156a

#156a44 · #19156a · #6a153b

Contrast

#666a15 as textRatioAAAA largeAAAFix
Aaon white
5.77:1passpassfail
  • AAA: use #565912 as the text (7.41:1)
Aaon black
3.64:1failpassfail
  • AA: use #777b18 as the text (4.63:1)
  • AAA: use #979e1f as the text (7.23:1)
  • AA: or shift the background to #e6e6e6 (4.63:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #666a15 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

#666a15 reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #666a15
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 #666a15 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/666a15-b9bea2-4e8ddf-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