# #663c68

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

## Values

- Hex: `#663c68`
- RGB: rgb(102, 60, 104)
- HSL: hsl(297, 27%, 32%)
- OKLCH: oklch(0.424 0.087 325.4)
- Relative luminance: 0.0706
- Nearest named color: Majesty (#673e6e, Δ 1.047) — https://brandsweets.com/colors/majesty
- Moods: cool, muted
- Page: https://brandsweets.com/colors/663c68

## Tints & shades

- Tints (toward white): #7c497e, #8f5492, #a264a6, #ae77b1, #bb8ebe, #c9a4cb, #d5b8d6, #e2cee3, #eee2ee, #fbf9fb
- Shades (toward black): #5c365e, #523054, #4c2d4e, #432744, #39223a, #301c31, #261627, #201320, #160d17, #0d070d

## Harmonies

- Complementary: #3e683c
- Analogous: #4f3c68, #683c54
- Triadic: #68653c, #3c6865
- Split-complementary: #54683c, #3c684f
- Tetradic: #684f3c, #3e683c, #3c5468

## Colors that go with #663c68

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 #663c68 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
- **Denim** #1560bd [pool] — Designers have shipped Denim with #663c68: 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 #663c68: 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 #663c68 in 6 real palettes, including Console Light and GitHub's brand system, as the lead colour. Seen in: Console Light (https://brandsweets.com/palettes/technical#console-light), GitHub (https://brandsweets.com/colors/brands/github), Stripe (https://brandsweets.com/colors/brands/stripe), Zoom (https://brandsweets.com/colors/brands/zoom-us). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #663c68 in 9 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 #663c68: 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
- **Champagne** #f7e7ce [pool] — 3 real palettes, including Bramble and Darkroom put Champagne beside #663c68, as the text colour against it. Seen in: Bramble (https://brandsweets.com/palettes/muted#bramble), Darkroom (https://brandsweets.com/palettes/muted#darkroom), BrandSweets (https://brandsweets.com/colors/brands/brandsweets). — https://brandsweets.com/colors/champagne
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #663c68: 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): 8.71:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.41:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9e5da2 (4.54:1); AA: background → #bdbdbd (4.64:1); AAA: text → #b887ba (7.21:1); AAA: background → #e8e8e8 (7.11:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/663c68-c19fbe-9acb62-2d1f28-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: "#663c68" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.