Color
#b51de7
#b51de7rgb(181, 29, 231)hsl(285, 81%, 51%)oklch(0.585 0.274 314.9)Colors that go with #b51de7
Olive Drab, Charcoal 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.
Olive Drab #6b8e23
complementaryOlive Drab sits directly opposite #b51de7 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #b51de7: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
shippedDesigners have shipped Denim with #b51de7: 3 real palettes, including Hasbro's brand system and Peacock, as the supporting colour.
Dark Cyan #008b8b
triadicshippedDark Cyan completes a triad with #b51de7 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Olive Green #808000
split-complementOlive Green is a split-complement of #b51de7: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Sea Green #2e8b57
split-complementSea Green is a split-complement of #b51de7: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Medium Slate Blue #7b68ee
analogousshippedMedium Slate Blue is #b51de7's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Light Sea Green #20b2aa
shippedLight Sea Green shows up next to #b51de7 in two real palettes: Taco Bell's brand system and Circuit, as the accent.
Real palettes that use #b51de7
Tints & shades
Harmonies
Contrast
| #b51de7 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.89:1 | pass | pass | fail |
|
Aaon black | 4.29:1 | 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 #b51de7 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
#b51de7 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 #b51de7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/b51de7-bc9fc1-afcb62-2d1f2b-ebe9f1?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