Color
#66e18d
#66e18drgb(102, 225, 141)hsl(139, 67%, 64%)oklch(0.819 0.162 151.6)Colors that go with #66e18d
Deep Sky Blue, Mustard Yellow and Taupe 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.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #66e18d: 4 real palettes, including Remix's brand system and Prime Video's brand system, as the lead colour.
Mustard Yellow #ffdb58
shipped4 real palettes, including Fresh Juice and Citrus Grove put Mustard Yellow beside #66e18d, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #66e18d in 14 real palettes, including 7-Eleven's brand system and WhatsApp's brand system, as the lead colour.
Violet #ee82ee
complementaryViolet sits directly opposite #66e18d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Light Coral #f08080
split-complementshippedLight Coral is a split-complement of #66e18d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Plum #dda0dd
split-complementshippedPlum is a split-complement of #66e18d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue #0000ff
shipped3 real palettes, including MongoDB's brand system and Minecraft's brand system put Blue beside #66e18d, as the accent.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #66e18d: softer than #000 and cool enough to feel like part of the same palette.
Real palettes that use #66e18d
Tints & shades
Harmonies
Contrast
| #66e18d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.65:1 | fail | fail | fail | |
Aaon black | 12.72:1 | pass | pass | pass | Passes 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 #66e18d as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #66e18d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/66e18d-a2beae-c059d4-1f2d2a-ebf1e9?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md