# #640b66

A color — cool, vivid, dark, technical, modern, luxury, bold. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#640b66`
- RGB: rgb(100, 11, 102)
- HSL: hsl(299, 81%, 22%)
- OKLCH: oklch(0.36 0.156 327.2)
- Relative luminance: 0.0391
- Nearest named color: Cosmic Explorer (#551155, Δ 4.259) — https://brandsweets.com/colors/cosmic-explorer
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/640b66

## Tints & shades

- Tints (toward white): #880f8a, #a812ab, #cd16d0, #e421e8, #e946ec, #ed6bef, #f18cf3, #f6b1f7, #f9d1fa, #fef6fe
- Shades (toward black): #5b0a5c, #520953, #4d084e, #440745, #3b063c, #320533, #29042a, #240425, #1b031c, #120212

## Harmonies

- Complementary: #0c660b
- Analogous: #370b66, #660b3a
- Triadic: #66640b, #0b6664
- Split-complementary: #3a660b, #0b6637
- Tetradic: #66370b, #0c660b, #0b3a66

## Colors that go with #640b66

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Forest Green** #228b22 [harmony: complementary] — Forest Green sits directly opposite #640b66 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/forestgreen
- **Denim** #1560bd [pool] — Designers have shipped Denim with #640b66: 3 real palettes, including Hinge's brand system and Slack's brand system, as the accent. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Slack (https://brandsweets.com/colors/brands/slack-com), Heinz (https://brandsweets.com/colors/brands/heinz-com). — https://brandsweets.com/colors/denim
- **Teal** #008080 [harmony: split] — Teal is a split-complement of #640b66: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/teal
- **Olive Green** #808000 [harmony: split] — Olive Green is a split-complement of #640b66: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/olive
- **Blue Violet** #8a2be2 [harmony, pool: analogous] — Blue Violet is #640b66's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Taco Bell (https://brandsweets.com/colors/brands/tacobell-com). — https://brandsweets.com/colors/blueviolet
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #640b66: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/charcoal
- **Sandy Brown** #f4a460 [pool] — Sandy Brown is paired with #640b66 in two real palettes: Golden Hour and Dusk Gradient, as the lead colour. Seen in: Golden Hour (https://brandsweets.com/palettes/warm#golden-hour), Dusk Gradient (https://brandsweets.com/palettes/dark#dusk-gradient). — https://brandsweets.com/colors/sandybrown
- **Tomato** #ff6347 [pool] — Two real palettes: FedEx's brand system and Golden Hour put Tomato beside #640b66, as the supporting colour. Seen in: FedEx (https://brandsweets.com/colors/brands/fedex-com), Golden Hour (https://brandsweets.com/palettes/warm#golden-hour). — https://brandsweets.com/colors/tomato

## Contrast (WCAG 2.x, as text)

- On white (#ffffff): 11.79:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.78:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #cd16d0 (4.62:1); AA: background → #a1a1a1 (4.56:1); AAA: text → #eb54ed (7.02:1); AAA: background → #c9c9c9 (7.12:1)

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern
- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/640b66-c19fbd-96cb62-2d1f27-ede9f1?lock=0&style=vibrant
(Humans lock/regenerate in the tool; the URL is the state — read `lock=` back to see what they kept.)

## Connect an agent

Point any MCP client at the BrandSweets colors endpoint for the same engine:

- Endpoint: https://mcp.brandsweets.com/colors/mcp
- Tools: `analyze_color` (e.g. `analyze_color({ color: "#640b66" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.