Meadow
Open in tool →Fresh green, buttercup and a wildflower pink — spring at full saturation; the leaf-dark text does the anchoring.
Color
#66bb3e
#66bb3e
hex
#66bb3ergb
rgb(102, 187, 62)hsl
hsl(101, 50%, 49%)oklch
oklch(0.713 0.18 137.3)Closest name: Exit Light (#55bb33)Relative luminance 0.3871
Colors that go with #66bb3e
Charcoal, Royal Blue 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.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #66bb3e: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Royal Blue #4169e1
shippedRoyal Blue is paired with #66bb3e in 6 real palettes, including Brilliant's brand system and Monster Energy's brand system, as the accent.
Taupe #483c32
shippedTaupe is paired with #66bb3e in 7 real palettes, including Meadow and Obsidian's brand system, as the text colour against it.
Orchid #da70d6
complementaryOrchid sits directly opposite #66bb3e on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Hot Pink #ff69b4
split-complementshippedHot Pink is a split-complement of #66bb3e: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Cornflower Blue #6495ed
split-complementshippedCornflower Blue is a split-complement of #66bb3e: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #66bb3e in 3 real palettes, including Undergrowth and Forest Floor, as the supporting colour.
Dark Orange #ff8c00
shippedDark Orange shows up next to #66bb3e in 3 real palettes, including Playground and Citrus Grove, as the lead colour.
Real palettes that use #66bb3e
Tints & shades
Harmonies
Contrast
| #66bb3e as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.4:1 | fail | fail | fail | |
Aaon black | 8.74:1 | 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 #66bb3e as the background.
Brands using this color
Palettes built around it
mcpConnect your agent — build around #66bb3e
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #66bb3e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/66bb3e-a7bea2-6b4edf-1f2d21-eff1e9?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