Color
#513b78
#513b78rgb(81, 59, 120)hsl(262, 34%, 35%)oklch(0.406 0.101 298.4)Colors that go with #513b78
Blue, Crimson and Denim 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.
Blue #0000ff
shipped4 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #513b78, as the accent.
Crimson #dc143c
shippedCrimson is paired with #513b78 in 8 real palettes, including Wells Fargo's brand system and Walgreens's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #513b78: 11 real palettes, including Hinge's brand system and HP's brand system, as the accent.
Midnight Blue #191970
shipped10 real palettes, including Microsoft's brand system and First Snow put Midnight Blue beside #513b78, as the accent.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #513b78: 6 real palettes, including First Snow and Glacier, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #513b78 in 11 real palettes, including Zoom's brand system and Nokia's brand system, as the lead colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #513b78: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Dark Olive Green #556b2f
complementaryDark Olive Green sits directly opposite #513b78 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #513b78
Tints & shades
Harmonies
Contrast
| #513b78 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.35:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.25:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #513b78 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 #513b78 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/513b78-af9cc4-dfce4e-2a1f2d-e9eaf1?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