Color

#66ea5d

#66ea5d
hex#66ea5d
rgbrgb(102, 234, 93)
hslhsl(116, 77%, 64%)
oklchoklch(0.834 0.216 142.3)
Closest name: Herbivore (#88ee77)Relative luminance 0.6246

Colors that go with #66ea5d

Deep Sky Blue, Taupe and Violet 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 →

#e05dea

#adea5d · #5dea9a

#5d66ea · #ea5d66

Split-complementary

Open in tool →

#9a5dea · #ea5dad

#5dadea · #e05dea · #ea9a5d

Contrast

#66ea5d as textRatioAAAA largeAAAFix
Aaon white
1.56:1failfailfail
  • AA: use #198712 as the text (4.65:1)
  • AAA: use #13630d as the text (7.45:1)
  • AA: or shift the background to #595959 (4.5:1)
  • AAA: or shift the background to #3b3b3b (7.2:1)
Aaon black
13.49:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #66ea5d as the background.

Brands using this color

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

mcpConnect your agent — build around #66ea5d
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 #66ea5d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66ea5d-a2bea3-8f4edf-1f2d24-eef1e9?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