# #666d5a

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

## Values

- Hex: `#666d5a`
- RGB: rgb(102, 109, 90)
- HSL: hsl(82, 10%, 39%)
- OKLCH: oklch(0.523 0.03 123.9)
- Relative luminance: 0.145
- Nearest named color: Italian Basil (#5f6957, Δ 1.673) — https://brandsweets.com/colors/italian-basil
- Moods: muted
- Page: https://brandsweets.com/colors/666d5a

## Tints & shades

- Tints (toward white): #767e67, #858f76, #949c86, #a3aa97, #b2b8a8, #bec3b6, #cdd1c7, #dcdfd8, #ebede9, #fafaf9
- Shades (toward black): #5e6553, #545a49, #4c5143, #414639, #3a3e32, #2f3229, #272a22, #1d1f19, #151612, #0a0b09

## Harmonies

- Complementary: #615a6d
- Analogous: #6d6b5a, #5c6d5a
- Triadic: #5a666d, #6d5a66
- Split-complementary: #5a5c6d, #6b5a6d
- Tetradic: #5a6d6b, #615a6d, #6d5a5c

## Colors that go with #666d5a

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 #666d5a: 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), Campus (https://brandsweets.com/palettes/friendly#campus), Canopy (https://brandsweets.com/palettes/cool#canopy), Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/charcoal
- **Slate Blue** #6a5acd [harmony, pool: complementary] — Slate Blue sits directly opposite #666d5a 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 Forest Floor and BrandSweets's brand system put Champagne beside #666d5a, as that palette's text colour. Seen in: Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), 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 #666d5a: 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), Wellness (https://brandsweets.com/palettes/warm#wellness), Desert Road (https://brandsweets.com/palettes/warm#desert-road). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #666d5a in 6 real palettes, including Five Guys's brand system and Netflix's brand system, as the supporting colour. Seen in: Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Redfin (https://brandsweets.com/colors/brands/redfin-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #666d5a: 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 #666d5a: 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 #666d5a in 6 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): 5.38:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #545a49 (7.15:1)
- On black (#000000): 3.9:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #717963 (4.62:1); AA: background → #ebebeb (4.52:1); AAA: text → #929a84 (7.18:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/666d5a-b0bea2-4e5fdf-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: "#666d5a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.