Color
#511b64
#511b64rgb(81, 27, 100)hsl(284, 57%, 25%)oklch(0.342 0.129 315.9)Colors that go with #511b64
Denim, Midnight Blue and Sea Green 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.
Denim #1560bd
shippedDenim is paired with #511b64 in 4 real palettes, including Hinge's brand system and Slack's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #511b64 in 5 real palettes, including Tide Pool and Gillette's brand system, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Sea Green #2e8b57
complementarySea Green sits directly opposite #511b64 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Crimson #dc143c
shippedCrimson is paired with #511b64 in 3 real palettes, including Lenovo's brand system and Marvel's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Slate Blue #6a5acd
analogousshippedSlate Blue is #511b64's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
triadicshippedTeal completes a triad with #511b64 — 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 #511b64: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #511b64: softer than #000 and cool enough to feel like part of the same palette.
Real palettes that use #511b64
Tints & shades
Harmonies
Contrast
| #511b64 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.42:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.69:1 | 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 #511b64 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
#511b64 reads as cool, dark, luxury. 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 #511b64 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/511b64-bc9fc1-b1cb62-2d1f2b-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