# #643c68

A color — cool, muted. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#643c68`
- RGB: rgb(100, 60, 104)
- HSL: hsl(295, 27%, 32%)
- OKLCH: oklch(0.421 0.086 323.7)
- Relative luminance: 0.0694
- Nearest named color: Plum (#66386a, Δ 1.187) — https://brandsweets.com/colors/plum-2
- Moods: cool, muted
- Page: https://brandsweets.com/colors/643c68

## Tints & shades

- Tints (toward white): #7a497e, #8d5492, #a064a6, #ac77b1, #ba8ebe, #c8a4cb, #d4b8d6, #e1cee3, #ede2ee, #fbf9fb
- Shades (toward black): #5b365e, #513054, #4b2d4e, #422744, #38223a, #2f1c31, #251627, #1f1320, #160d17, #0c070d

## Harmonies

- Complementary: #3f683c
- Analogous: #4e3c68, #683c55
- Triadic: #68643c, #3c6864
- Split-complementary: #55683c, #3c684e
- Tetradic: #684e3c, #3f683c, #3c5568

## Colors that go with #643c68

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

- **Sea Green** #2e8b57 [harmony, pool: complementary] — Sea Green sits directly opposite #643c68 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Subaru (https://brandsweets.com/colors/brands/subaru-com). — https://brandsweets.com/colors/seagreen
- **Crimson** #dc143c [pool] — Crimson is paired with #643c68 in 4 real palettes, including Lenovo's brand system and Wells Fargo's brand system, as the supporting colour. Seen in: Lenovo (https://brandsweets.com/colors/brands/lenovo-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #643c68: 5 real palettes, including Hinge's brand system and HP's brand system, as the accent. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), HP (https://brandsweets.com/colors/brands/hp-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com). — https://brandsweets.com/colors/denim
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #643c68: 4 real palettes, including Nursery and First Snow, as the supporting colour. Seen in: Nursery (https://brandsweets.com/palettes/light#nursery), First Snow (https://brandsweets.com/palettes/cool#first-snow), Stone (https://brandsweets.com/palettes/neutral#stone), Macaron (https://brandsweets.com/palettes/light#macaron). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #643c68 in 5 real palettes, including Console Light and Zoom's brand system, as the lead colour. Seen in: Console Light (https://brandsweets.com/palettes/technical#console-light), Zoom (https://brandsweets.com/colors/brands/zoom-us), Stripe (https://brandsweets.com/colors/brands/stripe), GitHub (https://brandsweets.com/colors/brands/github). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #643c68 in 8 real palettes, including Blush and Sepia Mono, as that palette's text colour. Seen in: Blush (https://brandsweets.com/palettes/light#blush), Sepia Mono (https://brandsweets.com/palettes/warm#sepia-mono), Dusk (https://brandsweets.com/palettes/cool#dusk), GitHub (https://brandsweets.com/colors/brands/github). — https://brandsweets.com/colors/taupe
- **Teal** #008080 [harmony, pool: split] — Teal is a split-complement of #643c68: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Stanley (https://brandsweets.com/colors/brands/stanley1913-com). — https://brandsweets.com/colors/teal
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #643c68: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 8.79:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.39:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9c5da2 (4.5:1); AA: background → #bababa (4.53:1); AAA: text → #b687ba (7.16:1); AAA: background → #e6e6e6 (7.05:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/643c68-c19fbf-9dcb62-2d1f28-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: "#643c68" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.