Color
#511cba
#511cbargb(81, 28, 186)hsl(260, 74%, 42%)oklch(0.421 0.219 287.9)Colors that go with #511cba
Charcoal, Royal Blue 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #511cba: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #511cba's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Denim #1560bd
shippedDesigners have shipped Denim with #511cba: 4 real palettes, including Google's brand system and Slack's brand system, as the accent.
Midnight Blue #191970
shipped5 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #511cba, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with #511cba in 4 real palettes, including Tide's brand system and Prepare your taste buds...'s brand system, as the accent.
Olive Green #808000
complementaryOlive Green sits directly opposite #511cba on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped3 real palettes, including Zillow's brand system and Procter & Gamble's brand system put Blue beside #511cba, as the lead colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #511cba: 3 real palettes, including Peacock's brand system and Blue Mono, as the accent.
Real palettes that use #511cba
Tints & shades
Harmonies
Contrast
| #511cba as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.44:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.23:1 | 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 #511cba as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#511cba 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 #511cba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/511cba-ae9cc4-dfc94e-2a1f2d-e9ebf1?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