Color
#4039fe
#4039fergb(64, 57, 254)hsl(242, 99%, 61%)oklch(0.509 0.274 272.4)Colors that go with #4039fe
Charcoal, Amber and Cobalt 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 #4039fe: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #4039fe in 5 real palettes, including Walmart's brand system and Binance's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #4039fe in 8 real palettes, including NHL's brand system and Zillow's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #4039fe in 7 real palettes, including Qualcomm's brand system and Roblox's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #4039fe in 8 real palettes, including Coinbase's brand system and Toyota's brand system — a combination designers have actually shipped, not a computed rotation.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #4039fe in 4 real palettes, including Warp's brand system and Elastic's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #4039fe in 5 real palettes, including Pixar's brand system and Chase's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #4039fe — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #4039fe
Tints & shades
Harmonies
Contrast
| #4039fe as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.49:1 | pass | pass | fail |
|
Aaon black | 3.23:1 | fail | 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 #4039fe as the background.
Brands using this color
Fonts for this mood
#4039fe 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 #4039fe and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/4039fe-a29cc4-df9e4e-261f2d-e9edf1?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