Color
#4591d3
#4591d3rgb(69, 145, 211)hsl(208, 62%, 55%)oklch(0.638 0.125 247.5)Colors that go with #4591d3
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 #4591d3: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
complementaryshippedCopper sits directly opposite #4591d3 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 #4591d3 in 10 real palettes, including Beach Hut and Heatwave, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #4591d3 in 8 real palettes, including Qualcomm's brand system and Readymag's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #4591d3 in 6 real palettes, including Hershey's's brand system and Blue Mono, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #4591d3 in 4 real palettes, including Retro Pop and State Farm's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Dark Orange #ff8c00
shippedDark Orange is paired with #4591d3 in 4 real palettes, including Elastic's brand system and Playground, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #4591d3 in 7 real palettes, including Patreon's brand system and Figma's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #4591d3
Tints & shades
Harmonies
Contrast
| #4591d3 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.36:1 | fail | pass | fail | |
Aaon black | 6.24:1 | 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 #4591d3 as the background.
Brands using this color
Fonts for this mood
#4591d3 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 #4591d3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/4591d3-9cadc4-df4e51-1f212d-e9f1f1?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