CSS color
rebeccapurple
#663399rgb(102, 51, 153)hsl(270, 50%, 40%)oklch(0.44 0.16 303.4)Rebeccapurple on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 1 public brand that uses it and the palettes it appears in.
Colors that go with rebeccapurple
Crimson, Denim and Royal Blue 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.
Crimson #dc143c
shippedCrimson is paired with rebeccapurple in 4 real palettes, including Wells Fargo's brand system and Gemstone, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with rebeccapurple: 4 real palettes, including Slack's brand system and Hinge's brand system, as the lead colour.
Royal Blue #4169e1
analogousshippedRoyal Blue is rebeccapurple's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Tomato #ff6347
shipped5 real palettes, including FedEx's brand system and GitLab's brand system put Tomato beside rebeccapurple, as the supporting colour.
Olive Green #808000
complementaryOlive Green sits directly opposite rebeccapurple 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 rebeccapurple: softer than #000 and cool enough to feel like part of the same palette.
Midnight Blue #191970
shipped3 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside rebeccapurple, as the lead colour.
Taupe #483c32
shippedTaupe is paired with rebeccapurple in 3 real palettes, including Datadog's brand system and Superhuman's brand system, as that palette's text colour.
Real palettes that use rebeccapurple
Tints & shades
Harmonies
Contrast
| rebeccapurple as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.41:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.5:1 | 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 rebeccapurple as the background.
Brands using this color
Fonts for this mood
rebeccapurple 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 #663399 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/663399-b59cc4-c9cb62-2c1f2d-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