# #66519e

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

## Values

- Hex: `#66519e`
- RGB: rgb(102, 81, 158)
- HSL: hsl(256, 32%, 47%)
- OKLCH: oklch(0.493 0.12 294.1)
- Relative luminance: 0.1118
- Nearest named color: Passion Flower (#6f5698, Δ 2.446) — https://brandsweets.com/colors/passion-flower
- Moods: cool, muted
- Page: https://brandsweets.com/colors/66519e

## Tints & shades

- Tints (toward white): #725dac, #816eb4, #907fbd, #9e90c6, #b0a4d0, #bfb5d9, #cdc6e2, #dcd7ea, #eae7f3, #f9f8fc
- Shades (toward black): #5d4b91, #524280, #4a3b72, #413465, #382d58, #2e2447, #251d39, #1c172c, #110e1b, #09070d

## Harmonies

- Complementary: #8a9e51
- Analogous: #51639e, #8c519e
- Triadic: #9e6651, #519e66
- Split-complementary: #9e8c51, #639e51
- Tetradic: #9e5163, #8a9e51, #519e8c

## Colors that go with #66519e

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 #66519e: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com), Harbour (https://brandsweets.com/palettes/cool#harbour). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #66519e: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: 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), Next.js (https://brandsweets.com/colors/brands/nextjs-org). — https://brandsweets.com/colors/seagreen
- **Amber** #ffbf00 [pool] — Amber is paired with #66519e in 4 real palettes, including Warner Bros.'s brand system and Wikipedia's brand system, as the accent. Seen in: Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 4 real palettes, including Pixar's brand system and Activision's brand system put Blue beside #66519e, as the accent. Seen in: Pixar (https://brandsweets.com/colors/brands/pixar-com), Activision (https://brandsweets.com/colors/brands/activision-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), CVS (https://brandsweets.com/colors/brands/cvs-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #66519e in 12 real palettes, including Wells Fargo's brand system and Marvel's brand system, as the lead colour. Seen in: Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Netflix (https://brandsweets.com/colors/brands/netflix), Ulta Beauty (https://brandsweets.com/colors/brands/ulta-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #66519e: 4 real palettes, including Kraken's brand system and Calm's brand system, as the accent. Seen in: Kraken (https://brandsweets.com/colors/brands/kraken-com), Calm (https://brandsweets.com/colors/brands/calm-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #66519e: 5 real palettes, including Campbell's's brand system and Datadog's brand system, as the supporting colour. Seen in: Campbell's (https://brandsweets.com/colors/brands/campbells-com), Datadog (https://brandsweets.com/colors/brands/datadoghq-com), AT&T (https://brandsweets.com/colors/brands/att-com), Nissan (https://brandsweets.com/colors/brands/nissanusa-com). — https://brandsweets.com/colors/firebrick
- **Midnight Blue** #191970 [pool] — 16 real palettes, including Marvel's brand system and Fintech Trust put Midnight Blue beside #66519e, as the supporting colour. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com), FIFA (https://brandsweets.com/colors/brands/fifa-com). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 6.49:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #5f4c94 (7.12:1)
- On black (#000000): 3.24:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #7e6bb3 (4.64:1); AA: background → #d9d9d9 (4.6:1); AAA: text → #9b8dc4 (7:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/66519e-ab9cc4-dfbf4e-291f2d-e9ebf1?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: "#66519e" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.