Color
#397fdb
#397fdbrgb(57, 127, 219)hsl(214, 69%, 54%)oklch(0.598 0.157 256.4)Colors that go with #397fdb
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 #397fdb: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
complementaryshippedCopper sits directly opposite #397fdb 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 #397fdb in 10 real palettes, including Walmart's brand system and Wired's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #397fdb in 13 real palettes, including Readymag's brand system and Qualcomm's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #397fdb in 10 real palettes, including Carrefour's brand system and Hershey's's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #397fdb in 12 real palettes, including Foot Locker's brand system and State Farm's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #397fdb in 7 real palettes, including Patreon's brand system and Astro's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Firebrick #b22222
shippedFirebrick is paired with #397fdb in 5 real palettes, including AT&T's brand system and Campbell's's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #397fdb
Tints & shades
Harmonies
Contrast
| #397fdb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.01:1 | fail | pass | fail | |
Aaon black | 5.23:1 | 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 #397fdb as the background.
Brands using this color
Fonts for this mood
#397fdb 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 #397fdb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/397fdb-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