Color
#51a5cd
#51a5cdrgb(81, 165, 205)hsl(199, 55%, 56%)oklch(0.686 0.1 231.4)Colors that go with #51a5cd
Charcoal, Peru 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 #51a5cd: softer than #000 and cool enough to feel like part of the same palette.
Peru #cd853f
complementaryshippedPeru sits directly opposite #51a5cd 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 #51a5cd in 7 real palettes, including Salesforce's brand system and NBA's brand system, as the accent.
Blue #0000ff
shipped5 real palettes, including Canva's brand system and Warp's brand system put Blue beside #51a5cd, as the accent.
Dark Orange #ff8c00
shippedDark Orange shows up next to #51a5cd in 4 real palettes, including Elastic's brand system and Learning App, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #51a5cd: 7 real palettes, including Coca-Cola's brand system and Gopro's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #51a5cd: 5 real palettes, including Venmo's brand system and Figma's brand system, as the lead colour.
Midnight Blue #191970
shipped9 real palettes, including Confluent's brand system and SoFi's brand system put Midnight Blue beside #51a5cd, as the lead colour.
Real palettes that use #51a5cd
Tints & shades
Harmonies
Contrast
| #51a5cd as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.76:1 | fail | fail | fail | |
Aaon black | 7.61:1 | 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 #51a5cd 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
#51a5cd 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 #51a5cd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51a5cd-9cb3c4-df4e66-1f232d-e9f1f0?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