Playground
Open in tool →Orange, blue and green — the colors of playground equipment; loud, cheerful, obviously for kids.
Color
#427cfa
#427cfa
hex
#427cfargb
rgb(66, 124, 250)hsl
hsl(221, 95%, 62%)oklch
oklch(0.616 0.198 263.2)Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2248
Colors that go with #427cfa
Charcoal, Amber and Blue 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 #427cfa: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #427cfa in 5 real palettes, including Heatwave and NBA's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #427cfa in 10 real palettes, including Cargo's brand system and Samsung's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #427cfa in 9 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.
Crimson #dc143c
shippedCrimson is paired with #427cfa in 9 real palettes, including Behance's brand system and WWE'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 #427cfa in 5 real palettes, including Figma's brand system and Calm's brand system — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #427cfa in 7 real palettes, including Guinness's brand system and Square's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Red #ff0000
triadicshippedRed completes a triad with #427cfa — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #427cfa
Tints & shades
Harmonies
Contrast
| #427cfa as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.82:1 | fail | pass | fail | |
Aaon black | 5.5:1 | 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 #427cfa as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#427cfa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #427cfa
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #427cfa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/427cfa-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