# #640b74

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

## Values

- Hex: `#640b74`
- RGB: rgb(100, 11, 116)
- HSL: hsl(291, 83%, 25%)
- OKLCH: oklch(0.37 0.167 320.5)
- Relative luminance: 0.0421
- Nearest named color: Extraviolet (#661188, Δ 3.448) — https://brandsweets.com/colors/extraviolet
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/640b74

## Tints & shades

- Tints (toward white): #810e95, #a111bb, #bd14db, #ce28eb, #d64eef, #de6ef2, #e58ff5, #edb0f8, #f5d5fb, #fdf6fe
- Shades (toward black): #5d0a6b, #550962, #4d0859, #45074f, #3c0746, #300538, #28042f, #200325, #18031c, #100213

## Harmonies

- Complementary: #1b750b
- Analogous: #300b75, #750b50
- Triadic: #75650b, #0b7565
- Split-complementary: #50750b, #0b7530
- Tetradic: #75300b, #1b750b, #0b5075

## Colors that go with #640b74

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 #640b74 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
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #640b74: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com). — https://brandsweets.com/colors/charcoal
- **Tomato** #ff6347 [pool] — 3 real palettes, including FedEx's brand system and Golden Hour put Tomato beside #640b74, as the supporting colour. Seen in: FedEx (https://brandsweets.com/colors/brands/fedex-com), Golden Hour (https://brandsweets.com/palettes/warm#golden-hour), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com). — https://brandsweets.com/colors/tomato
- **Olive Green** #808000 [harmony: split] — Olive Green is a split-complement of #640b74: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/olive
- **Sea Green** #2e8b57 [harmony: split] — Sea Green is a split-complement of #640b74: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/seagreen
- **Blue Violet** #8a2be2 [harmony, pool: analogous] — Blue Violet is #640b74'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
- **Denim** #1560bd [pool] — Designers have shipped Denim with #640b74: two real palettes: Slack's brand system and Hinge's brand system, as the lead colour. Seen in: Slack (https://brandsweets.com/colors/brands/slack-com), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/denim
- **Sandy Brown** #f4a460 [pool] — Sandy Brown is paired with #640b74 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

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

- On white (#ffffff): 11.4:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.84:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #c615e5 (4.64:1); AA: background → #a3a3a3 (4.52:1); AAA: text → #dc65f1 (7.17:1); AAA: background → #cccccc (7.1:1)

## 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/640b74-bf9fc1-a4cb62-2d1f29-ece9f1?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: "#640b74" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.