Color
#51b375
#51b375rgb(81, 179, 117)hsl(142, 39%, 51%)oklch(0.692 0.13 153.5)Colors that go with #51b375
Charcoal, Midnight Blue and Mustard Yellow 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 #51b375: softer than #000 and cool enough to feel like part of the same palette.
Midnight Blue #191970
shippedMidnight Blue is paired with #51b375 in 4 real palettes, including Fintech Trust and Telehealth, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Mustard Yellow #ffdb58
shippedMustard Yellow is paired with #51b375 in 5 real palettes, including Meadow and Diner, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Royal Blue #4169e1
shippedRoyal Blue is paired with #51b375 in 5 real palettes, including Khan Academy's brand system and Brilliant's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Taupe #483c32
shippedTaupe is paired with #51b375 in 14 real palettes, including Undergrowth and Meadow, as the surface under it — a combination designers have actually shipped, not a computed rotation.
Orchid #da70d6
complementaryOrchid sits directly opposite #51b375 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Medium Purple #9370db
split-complementshippedMedium Purple is a split-complement of #51b375: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Burlywood #deb887
shippedBurlywood is paired with #51b375 in 3 real palettes, including Coastal and Polaroid, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #51b375
Tints & shades
Harmonies
Contrast
| #51b375 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.61:1 | fail | fail | fail | |
Aaon black | 8.05:1 | 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 #51b375 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 #51b375 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51b375-a2beaf-c659d4-1f2d2a-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