Color
#51d3fb
#51d3fbrgb(81, 211, 251)hsl(194, 96%, 65%)oklch(0.811 0.125 222.1)Colors that go with #51d3fb
Charcoal, Crimson and Dodger 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 #51d3fb: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with #51d3fb in 4 real palettes, including Riot Games's brand system and Tiffany & Co.'s brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #51d3fb: 5 real palettes, including Patreon's brand system and Opensea's brand system, as the accent.
Midnight Blue #191970
shipped4 real palettes, including Telehealth and Blue Mono put Midnight Blue beside #51d3fb, as the text colour against it.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #51d3fb: 4 real palettes, including Glacier and Astro's brand system, as the lead colour.
Taupe #483c32
shippedTaupe is paired with #51d3fb in 10 real palettes, including Boeing's brand system and Astro's brand system, as the text colour against it.
Wheat #f5deb3
shippedDesigners have shipped Wheat with #51d3fb: 4 real palettes, including Oatly's brand system and Mint Chip, as the supporting colour.
Coral #ff7f50
complementaryCoral sits directly opposite #51d3fb 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 #51d3fb
Tints & shades
Harmonies
Contrast
| #51d3fb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.74:1 | fail | fail | fail | |
Aaon black | 12.06:1 | 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 #51d3fb as the background.
Brands using this color
Fonts for this mood
#51d3fb reads as cool, vivid, technical. 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 #51d3fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51d3fb-9cb6c4-df4e72-1f242d-e9f1ef?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