Color
#3770eb
#3770ebrgb(55, 112, 235)hsl(221, 82%, 57%)oklch(0.577 0.196 263)Colors that go with #3770eb
Charcoal, Crimson 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 #3770eb: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #3770eb — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Amber #ffbf00
shippedAmber is paired with #3770eb in 9 real palettes, including Walmart's brand system and NBA's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #3770eb in 13 real palettes, including BBC's brand system and EA's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #3770eb in 10 real palettes, including Carrefour's brand system and Behance's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #3770eb in 5 real palettes, including Webflow's brand system and NBA's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #3770eb in 7 real palettes, including Elastic's brand system and Calm's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Firebrick #b22222
shippedFirebrick is paired with #3770eb in 4 real palettes, including Bose's brand system and Nissan's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #3770eb
Tints & shades
Harmonies
Contrast
| #3770eb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.49:1 | fail | pass | fail | |
Aaon black | 4.68:1 | 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 #3770eb as the background.
Brands using this color
Fonts for this mood
#3770eb 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 #3770eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3770eb-9ca4c4-df6b4e-211f2d-e9eff1?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