Playground
Open in tool →Orange, blue and green — the colors of playground equipment; loud, cheerful, obviously for kids.
Color
#437ef4
#437ef4
hex
#437ef4rgb
rgb(67, 126, 244)hsl
hsl(220, 89%, 61%)oklch
oklch(0.616 0.188 262.3)Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2265
Colors that go with #437ef4
Charcoal, Red 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 #437ef4: softer than #000 and cool enough to feel like part of the same palette.
Red #ff0000
triadicshippedRed completes a triad with #437ef4 — 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 #437ef4 in 10 real palettes, including Heatwave and Walmart's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #437ef4 in 13 real palettes, including Readymag's brand system and Cargo'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 #437ef4 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 #437ef4 in 10 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 #437ef4 in 8 real palettes, including Patreon's brand system and Elastic's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #437ef4 in 15 real palettes, including Coursera's brand system and Guinness's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #437ef4
Tints & shades
Harmonies
Contrast
| #437ef4 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.8:1 | fail | pass | fail | |
Aaon black | 5.53:1 | 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 #437ef4 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#437ef4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #437ef4
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 #437ef4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/437ef4-9ca5c4-df694e-211f2d-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