Color
#51abb3
#51abb3rgb(81, 171, 179)hsl(185, 39%, 51%)oklch(0.689 0.086 203.2)Colors that go with #51abb3
Charcoal, Terracotta and Amber 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 #51abb3: softer than #000 and cool enough to feel like part of the same palette.
Terracotta #e2725b
complementaryshippedTerracotta sits directly opposite #51abb3 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #51abb3 in 4 real palettes, including Blueprint and Salesforce's brand system, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #51abb3 in 4 real palettes, including Coastal and Polaroid, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #51abb3: 4 real palettes, including Dusk and Riverbed, as the accent.
Cornflower Blue #6495ed
analogousshippedCornflower Blue is #51abb3's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #51abb3 in 4 real palettes, including Oatmeal and Warp's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #51abb3: 6 real palettes, including Open House and Dusk, as the lead colour.
Real palettes that use #51abb3
Tints & shades
Harmonies
Contrast
| #51abb3 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.68:1 | fail | fail | fail | |
Aaon black | 7.83:1 | 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 #51abb3 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#51abb3 reads as cool, modern. The font library is tagged with the same vocabulary:
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 #51abb3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51abb3-a2b8be-df4e88-1f262d-e9f1ee?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