Color
#51217d
#51217drgb(81, 33, 125)hsl(271, 58%, 31%)oklch(0.369 0.148 303.7)Colors that go with #51217d
Royal Blue, Charcoal and Crimson 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.
Royal Blue #4169e1
analogousshippedRoyal Blue is #51217d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #51217d: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with #51217d in 7 real palettes, including Lenovo's brand system and Casper Sleep's brand system, as the supporting colour.
Midnight Blue #191970
shipped5 real palettes, including Gillette's brand system and Visa's brand system put Midnight Blue beside #51217d, as the supporting colour.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #51217d: 4 real palettes, including FedEx's brand system and Fintech Trust, as the accent.
Tomato #ff6347
shipped4 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #51217d, as the supporting colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #51217d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Denim #1560bd
shippedDesigners have shipped Denim with #51217d: 3 real palettes, including Hinge's brand system and Slack's brand system, as the accent.
Real palettes that use #51217d
Tints & shades
Harmonies
Contrast
| #51217d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11.27:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.86:1 | 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 #51217d 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
#51217d reads as cool, modern. 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 #51217d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51217d-b59cc4-c7cb62-2c1f2d-eae9f1?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