# #646b57

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

## Values

- Hex: `#646b57`
- RGB: rgb(100, 107, 87)
- HSL: hsl(81, 10%, 38%)
- OKLCH: oklch(0.516 0.032 123.2)
- Relative luminance: 0.1391
- Nearest named color: Italian Basil (#5f6957, Δ 1.01) — https://brandsweets.com/colors/italian-basil
- Moods: muted
- Page: https://brandsweets.com/colors/646b57

## Tints & shades

- Tints (toward white): #747b65, #838c73, #929a84, #a1a894, #b0b6a5, #bfc3b6, #ced1c7, #dcdfd8, #ebede9, #fafaf9
- Shades (toward black): #5c6250, #515747, #4a4f40, #3f4337, #373b30, #2f3229, #252720, #1d1f19, #121410, #0b0b09

## Harmonies

- Complementary: #5e576b
- Analogous: #6b6857, #5a6b57
- Triadic: #57646b, #6b5764
- Split-complementary: #575a6b, #68576b
- Tetradic: #576b68, #5e576b, #6b575a

## Colors that go with #646b57

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

- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #646b57: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Stanley (https://brandsweets.com/colors/brands/stanley1913-com), Canopy (https://brandsweets.com/palettes/cool#canopy), Gusto (https://brandsweets.com/colors/brands/gusto-com), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/charcoal
- **Slate Blue** #6a5acd [harmony, pool: complementary] — Slate Blue sits directly opposite #646b57 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas). — https://brandsweets.com/colors/slateblue
- **Champagne** #f7e7ce [pool] — 6 real palettes, including BrandSweets's brand system and Forest Floor put Champagne beside #646b57. Seen in: BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke). — https://brandsweets.com/colors/champagne
- **Copper** #b87333 [pool] — Designers have shipped Copper with #646b57: 7 real palettes, including Clay & Linen and Riverbed, as the lead colour. Seen in: Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Desert Road (https://brandsweets.com/palettes/warm#desert-road), Wellness (https://brandsweets.com/palettes/warm#wellness). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #646b57 in 6 real palettes, including Gemstone and Five Guys's brand system, as the accent. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix), Redfin (https://brandsweets.com/colors/brands/redfin-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #646b57: 7 real palettes, including Campus and Intel's brand system, as the lead colour. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), Intel (https://brandsweets.com/colors/brands/intel-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #646b57: 4 real palettes, including Newsprint and Fireside, as the lead colour. Seen in: Newsprint (https://brandsweets.com/palettes/editorial#newsprint), Fireside (https://brandsweets.com/palettes/dark#fireside), Trader Joe's (https://brandsweets.com/colors/brands/traderjoes-com), Chipotle (https://brandsweets.com/colors/brands/chipotle-com). — https://brandsweets.com/colors/firebrick
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #646b57 in 5 real palettes, including Mid-Century and Harvest, as the accent. Seen in: Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Harvest (https://brandsweets.com/palettes/warm#harvest), Fireside (https://brandsweets.com/palettes/dark#fireside), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold). — https://brandsweets.com/colors/goldenrod

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

- On white (#ffffff): 5.55:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #545a49 (7.15:1)
- On black (#000000): 3.78:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #717963 (4.62:1); AA: background → #e8e8e8 (4.53:1); AAA: text → #929a84 (7.18:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/646b57-b1bea2-4e62df-222d1f-f1f0e9?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: "#646b57" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.