Color
#51639e
#51639ergb(81, 99, 158)hsl(226, 32%, 47%)oklch(0.512 0.096 269.9)Colors that go with #51639e
Charcoal, Sea Green 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 #51639e: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #51639e — 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 #51639e in 8 real palettes, including McDonald's's brand system and Warner Bros.'s brand system, as the lead colour.
Blue #0000ff
shipped4 real palettes, including Activision's brand system and Pixar's brand system put Blue beside #51639e, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #51639e: 8 real palettes, including Fintech Trust and Glacier, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #51639e in 16 real palettes, including Marvel's brand system and McDonald's's brand system, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #51639e: 5 real palettes, including Venmo's brand system and Deep Water, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #51639e: 5 real palettes, including Venmo's brand system and Apple's brand system, as the lead colour.
Real palettes that use #51639e
Tints & shades
Harmonies
Contrast
| #51639e as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.79:1 | pass | pass | fail |
|
Aaon black | 3.63:1 | 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 #51639e as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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 #51639e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51639e-9ca1c4-df774e-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