Color
#57558b
#57558brgb(87, 85, 139)hsl(242, 24%, 44%)oklch(0.476 0.086 284.3)Colors that go with #57558b
Charcoal, Sea Green and Steel 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 #57558b: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
split-complementshippedSea Green is a split-complement of #57558b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Steel Blue #4682b4
analogousshippedSteel Blue is #57558b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Amber #ffbf00
shippedAmber is paired with #57558b in 4 real palettes, including Warner Bros.'s brand system and McDonald's's brand system, as the accent.
Blue #0000ff
shipped4 real palettes, including Tesco's brand system and Pixar's brand system put Blue beside #57558b, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #57558b: 5 real palettes, including Fintech Trust and Unilever's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #57558b in 14 real palettes, including Wells Fargo's brand system and Walgreens's brand system, as the lead colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #57558b: 6 real palettes, including Campbell's's brand system and AT&T's brand system, as the supporting colour.
Real palettes that use #57558b
Tints & shades
Harmonies
Contrast
| #57558b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.82:1 | pass | pass | fail |
|
Aaon black | 3.08:1 | 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 #57558b 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 #57558b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/57558b-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