Color
#51a970
#51a970rgb(81, 169, 112)hsl(141, 35%, 49%)oklch(0.665 0.121 153.3)Colors that go with #51a970
Charcoal, Crimson and Denim 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 #51a970: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with #51a970 in 4 real palettes, including DuckDuckGo's brand system and Diner, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #51a970: 5 real palettes, including Peacock and Intel's brand system, as the supporting colour.
Midnight Blue #191970
shipped5 real palettes, including Fintech Trust and Telehealth put Midnight Blue beside #51a970, as the text colour against it.
Royal Blue #4169e1
shippedRoyal Blue is paired with #51a970 in 5 real palettes, including Khan Academy's brand system and Console Light, as the accent.
Slate Gray #708090
shipped4 real palettes, including Indigo SaaS and Greige put Slate Gray beside #51a970, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #51a970 in 16 real palettes, including Undergrowth and Resort, as the surface under it.
Orchid #da70d6
complementaryOrchid sits directly opposite #51a970 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #51a970
Tints & shades
Harmonies
Contrast
| #51a970 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.89:1 | fail | fail | fail | |
Aaon black | 7.26:1 | 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 #51a970 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 #51a970 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51a970-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