Color
#515c76
#515c76rgb(81, 92, 118)hsl(222, 19%, 39%)oklch(0.476 0.044 266.8)Colors that go with #515c76
Sea Green, Steel Blue and 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.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #515c76 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
analogousshippedSteel Blue is #515c76's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped5 real palettes, including Activision's brand system and Tesco's brand system put Blue beside #515c76, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #515c76: 4 real palettes, including Fintech Trust and Ink & Paper, as the lead colour.
Copper #b87333
shippedDesigners have shipped Copper with #515c76: 4 real palettes, including Dusk and Desert Road, as the accent.
Crimson #dc143c
shippedCrimson is paired with #515c76 in 14 real palettes, including Codecademy's brand system and Retro Pop, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #515c76: 4 real palettes, including Lamborghini's brand system and Warp's brand system, as the supporting colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #515c76: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #515c76
Tints & shades
Harmonies
Contrast
| #515c76 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.68:1 | pass | pass | fail |
|
Aaon black | 3.14:1 | 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 #515c76 as the background.
Brands using this color
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 #515c76 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/515c76-9ca3c4-df6e4e-211f2d-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