Color
#5187cd
#5187cdrgb(81, 135, 205)hsl(214, 55%, 56%)oklch(0.618 0.121 255.6)Colors that go with #5187cd
Charcoal, Copper 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 #5187cd: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
complementaryshippedCopper sits directly opposite #5187cd 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 #5187cd in 4 real palettes, including Beach Hut and Heatwave, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #5187cd in 5 real palettes, including Astro's brand system and Deep Water, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #5187cd in 5 real palettes, including Fintech Trust and Terminal, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #5187cd in 5 real palettes, including Plaid's brand system and Blue Mono, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Orange Red #ff4500
shippedOrange Red is paired with #5187cd in 6 real palettes, including Readymag's brand system and Launch Orange, as the accent — a combination designers have actually shipped, not a computed rotation.
Taupe #483c32
shippedTaupe is paired with #5187cd in 9 real palettes, including Retool's brand system and Notion's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #5187cd
Tints & shades
Harmonies
Contrast
| #5187cd as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.69:1 | fail | pass | fail | |
Aaon black | 5.7:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5187cd as the background.
Brands using this color
Fonts for this mood
#5187cd 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 #5187cd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/5187cd-9ca9c4-df5a4e-1f1f2d-e9f0f1?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