Color
#4275bd
#4275bdrgb(66, 117, 189)hsl(215, 48%, 50%)oklch(0.561 0.125 257.3)Colors that go with #4275bd
Charcoal, Sea Green and Sienna 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 #4275bd: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #4275bd — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #4275bd 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 #4275bd in 11 real palettes, including Wired's brand system and Lemon Squeezy's brand system, as the accent.
Blue #0000ff
shipped13 real palettes, including Activision's brand system and Pixar's brand system put Blue beside #4275bd, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #4275bd: 11 real palettes, including Hershey's's brand system and General Mills's brand system, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #4275bd: 6 real palettes, including Coca-Cola's brand system and NBA's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #4275bd in 16 real palettes, including NASCAR's brand system and State Farm's brand system, as the supporting colour.
Real palettes that use #4275bd
Tints & shades
Harmonies
Contrast
| #4275bd as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.66:1 | pass | pass | fail |
|
Aaon black | 4.51:1 | 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 #4275bd as the background.
Brands using this color
Fonts for this mood
#4275bd 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 #4275bd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/4275bd-9ca8c4-df5d4e-201f2d-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