Color
#51c271
#51c271rgb(81, 194, 113)hsl(137, 48%, 54%)oklch(0.729 0.156 150.1)Colors that go with #51c271
Charcoal, Dark Olive Green 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 #51c271: softer than #000 and cool enough to feel like part of the same palette.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #51c271 in 4 real palettes, including Undergrowth and Forest Floor, as the supporting colour.
Mustard Yellow #ffdb58
shipped4 real palettes, including Meadow and Citrus Grove put Mustard Yellow beside #51c271, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #51c271 in 5 real palettes, including Brilliant's brand system and Docker's brand system, as the accent.
Taupe #483c32
shippedTaupe is paired with #51c271 in 17 real palettes, including Chime's brand system and Obsidian's brand system, as the lead colour.
Orchid #da70d6
complementaryOrchid sits directly opposite #51c271 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped3 real palettes, including Unity's brand system and Minecraft's brand system put Blue beside #51c271, as the supporting colour.
Cornflower Blue #6495ed
triadicshippedCornflower Blue completes a triad with #51c271 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #51c271
Tints & shades
Harmonies
Contrast
| #51c271 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.26:1 | fail | fail | fail | |
Aaon black | 9.31:1 | 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 #51c271 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 #51c271 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51c271-a2bead-bb59d4-1f2d29-ebf1e9?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