Color
#66b783
#66b783rgb(102, 183, 131)hsl(141, 36%, 56%)oklch(0.714 0.111 154.3)Colors that go with #66b783
Charcoal, Blue and Cornflower 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #66b783: softer than #000 and cool enough to feel like part of the same palette.
Blue #0000ff
shipped5 real palettes, including Unity's brand system and Spotify's brand system put Blue beside #66b783, as the supporting colour.
Cornflower Blue #6495ed
triadicshippedCornflower Blue completes a triad with #66b783 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #66b783 in 4 real palettes, including Undergrowth and Forest Floor, as the supporting colour.
Dark Salmon #e9967a
triadicshippedDark Salmon completes a triad with #66b783 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Hunter Green #355e3b
shippedHunter Green is paired with #66b783 in 4 real palettes, including Pine & Birch and Neon's brand system, as the lead colour.
Midnight Blue #191970
shipped4 real palettes, including Fintech Trust and Telehealth put Midnight Blue beside #66b783, as the text colour against it.
Mustard Yellow #ffdb58
shipped5 real palettes, including Meadow and Fresh Juice put Mustard Yellow beside #66b783, as the supporting colour.
Real palettes that use #66b783
Tints & shades
Harmonies
Contrast
| #66b783 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.42:1 | fail | fail | fail | |
Aaon black | 8.67:1 | 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 #66b783 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 #66b783 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/66b783-a2beaf-c459d4-1f2d2a-eaf1e9?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