Color
#5781ff
#5781ffrgb(87, 129, 255)hsl(225, 100%, 67%)oklch(0.639 0.193 267)Colors that go with #5781ff
Charcoal, Medium Sea Green and Red 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 #5781ff: softer than #000 and cool enough to feel like part of the same palette.
Medium Sea Green #3cb371
triadicshippedMedium Sea Green completes a triad with #5781ff — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Red #ff0000
triadicshippedRed completes a triad with #5781ff — 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 #5781ff in 9 real palettes, including Google's brand system and Heatwave, as the accent.
Blue #0000ff
shipped12 real palettes, including Qualcomm's brand system and Unity's brand system put Blue beside #5781ff, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #5781ff: 8 real palettes, including Carrefour's brand system and Behance's brand system, as the accent.
Crimson #dc143c
shippedCrimson is paired with #5781ff in 8 real palettes, including Behance's brand system and WWE's brand system, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #5781ff: 9 real palettes, including Venmo's brand system and Patreon's brand system, as the supporting colour.
Real palettes that use #5781ff
Tints & shades
Harmonies
Contrast
| #5781ff as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.51:1 | fail | pass | fail | |
Aaon black | 5.99:1 | 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 #5781ff as the background.
Brands using this color
Fonts for this mood
#5781ff 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 #5781ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/5781ff-9ca1c4-df754e-221f2d-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