# #643a5b

A color — warm, muted, editorial, elegant. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#643a5b`
- RGB: rgb(100, 58, 91)
- HSL: hsl(313, 27%, 31%)
- OKLCH: oklch(0.411 0.076 335.2)
- Relative luminance: 0.0649
- Nearest named color: Long Passionate Night (#5b365e, Δ 2.338) — https://brandsweets.com/colors/long-passionate-night
- Moods: warm, muted, editorial, elegant
- Page: https://brandsweets.com/colors/643a5b

## Tints & shades

- Tints (toward white): #7b4770, #8e5281, #a46095, #b177a4, #be8eb3, #c9a1c0, #d6b8cf, #e3cedf, #eee2ec, #fbf9fb
- Shades (toward black): #5b3452, #54304c, #4a2b44, #41253b, #3a2235, #311c2c, #271623, #1d111a, #170d15, #0d070c

## Harmonies

- Complementary: #3a6443
- Analogous: #583a64, #643a46
- Triadic: #5b643a, #3a5b64
- Split-complementary: #46643a, #3a6458
- Tetradic: #64583a, #3a6443, #3a4664

## Colors that go with #643a5b

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 #643a5b 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 #643a5b in 4 real palettes, including Lenovo's brand system and Codecademy's brand system, as the supporting colour. Seen in: Lenovo (https://brandsweets.com/colors/brands/lenovo-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #643a5b: 4 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
- **Midnight Blue** #191970 [pool] — 4 real palettes, including Microsoft's brand system and First Snow put Midnight Blue beside #643a5b, as the accent. Seen in: Microsoft (https://brandsweets.com/colors/brands/microsoft-com), First Snow (https://brandsweets.com/palettes/cool#first-snow), Lufthansa (https://brandsweets.com/colors/brands/lufthansa-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/midnightblue
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #643a5b: 4 real palettes, including Nursery and Stone, as the supporting colour. Seen in: Nursery (https://brandsweets.com/palettes/light#nursery), Stone (https://brandsweets.com/palettes/neutral#stone), Macaron (https://brandsweets.com/palettes/light#macaron), First Snow (https://brandsweets.com/palettes/cool#first-snow). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #643a5b in 6 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), GitHub (https://brandsweets.com/colors/brands/github), Subaru (https://brandsweets.com/colors/brands/subaru-com). — https://brandsweets.com/colors/royalblue
- **Sage Green** #9caf88 [pool] — Designers have shipped Sage Green with #643a5b: 4 real palettes, including Stone and Darkroom, as the supporting colour. Seen in: Stone (https://brandsweets.com/palettes/neutral#stone), Darkroom (https://brandsweets.com/palettes/muted#darkroom), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal). — https://brandsweets.com/colors/sage-green
- **Cream** #fffdd0 [role] — Cream is the surface #643a5b wants: a warm off-white that shares its undertone, so #643a5b reads softer on it than on pure white. — https://brandsweets.com/colors/cream

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

- On white (#ffffff): 9.14:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.3:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #a25d93 (4.52:1); AA: background → #b8b8b8 (4.61:1); AAA: text → #ba87af (7.17:1); AAA: background → #e3e3e3 (7.12:1)

## Fonts for this mood

- warm: https://brandsweets.com/fonts/mood/warm
- editorial: https://brandsweets.com/fonts/mood/editorial
- elegant: https://brandsweets.com/fonts/mood/elegant

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/643a5b-c19fb5-7ecb62-2d1f24-efe9f1?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: "#643a5b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.