Color
#66b620
#66b620rgb(102, 182, 32)hsl(92, 70%, 42%)oklch(0.698 0.191 134.6)Colors that go with #66b620
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 #66b620: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Royal Blue #4169e1
shippedRoyal Blue is paired with #66b620 in 6 real palettes, including Brilliant's brand system and Monster Energy's brand system, as the accent.
Taupe #483c32
shippedTaupe is paired with #66b620 in 6 real palettes, including Meadow and Obsidian's brand system, as the text colour against it.
Orchid #da70d6
complementaryOrchid sits directly opposite #66b620 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 #66b620: 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 #66b620: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Dark Orange #ff8c00
shippedDark Orange shows up next to #66b620 in 3 real palettes, including Playground and Learning App, as the lead colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #66b620: 3 real palettes, including Playground and Unity's brand system, as the supporting colour.
Real palettes that use #66b620
Tints & shades
Harmonies
Contrast
| #66b620 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.54:1 | fail | fail | fail | |
Aaon black | 8.28:1 | 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 #66b620 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 #66b620 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/66b620-acbea2-564edf-202d1f-f1f1e9?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