# #66618f

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

## Values

- Hex: `#66618f`
- RGB: rgb(102, 97, 143)
- HSL: hsl(247, 19%, 47%)
- OKLCH: oklch(0.516 0.072 288.6)
- Relative luminance: 0.1336
- Nearest named color: Berry Jam (#655883, Δ 2.811) — https://brandsweets.com/colors/berry-jam
- Moods: cool, muted
- Page: https://brandsweets.com/colors/66618f

## Tints & shades

- Tints (toward white): #736d9c, #817da6, #908cb1, #9f9bbb, #b0adc7, #bfbcd2, #cdcbdc, #dcdbe6, #ebeaf1, #f9f9fb
- Shades (toward black): #5e5982, #534e73, #4a4667, #413e5b, #39364f, #2e2b40, #252334, #1c1b27, #111118, #09080c

## Harmonies

- Complementary: #898f61
- Analogous: #61738f, #7d618f
- Triadic: #8f6661, #618f66
- Split-complementary: #8f7d61, #738f61
- Tetradic: #8f6173, #898f61, #618f7d

## Colors that go with #66618f

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 text near-black for #66618f: softer than #000 and cool enough to feel like part of the same palette. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), Harbour (https://brandsweets.com/palettes/cool#harbour), Amazon (https://brandsweets.com/colors/brands/amazon-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #66618f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Subaru (https://brandsweets.com/colors/brands/subaru-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/seagreen
- **Amber** #ffbf00 [pool] — Amber is paired with #66618f in 6 real palettes, including McDonald's's brand system and Warner Bros.'s brand system, as the lead colour. Seen in: McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Champagne** #f7e7ce [pool] — 4 real palettes, including BrandSweets's brand system and Darkroom put Champagne beside #66618f. Seen in: BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Darkroom (https://brandsweets.com/palettes/muted#darkroom), Midnight Luxe (https://brandsweets.com/palettes/luxury#midnight-luxe), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar). — https://brandsweets.com/colors/champagne
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #66618f: 6 real palettes, including Fintech Trust and Ink & Paper, as the lead colour. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Ink & Paper (https://brandsweets.com/palettes/minimal#ink-and-paper), Glacier (https://brandsweets.com/palettes/cool#glacier), General Mills (https://brandsweets.com/colors/brands/generalmills-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #66618f in 15 real palettes, including Marvel's brand system and Retro Pop, as the accent. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #66618f: 10 real palettes, including Campus and The New York Times's brand system, as the lead colour. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), The New York Times (https://brandsweets.com/colors/brands/nytimes-com), HP (https://brandsweets.com/colors/brands/hp-com), Dutch Bros (https://brandsweets.com/colors/brands/dutchbros-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #66618f: 5 real palettes, including Newsprint and Honda's brand system, as the lead colour. Seen in: Newsprint (https://brandsweets.com/palettes/editorial#newsprint), Honda (https://brandsweets.com/colors/brands/honda-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 5.72:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #575379 (7.2:1)
- On black (#000000): 3.67:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #76709e (4.58:1); AA: background → #e6e6e6 (4.58:1); AAA: text → #9692b5 (7.08:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/66618f-a59cc4-dfaa4e-271f2d-e9ecf1?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: "#66618f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.