# #866fb3

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

## Values

- Hex: `#866fb3`
- RGB: rgb(134, 111, 179)
- HSL: hsl(260, 31%, 57%)
- OKLCH: oklch(0.591 0.104 298.7)
- Relative luminance: 0.1969
- Nearest named color: Lavish Spending (#8469bc, Δ 2.365) — https://brandsweets.com/colors/lavish-spending
- Moods: cool, muted
- Page: https://brandsweets.com/colors/866fb3

## Tints & shades

- Tints (toward white): #917dba, #9d8ac1, #a897c8, #b3a5cf, #c1b6d8, #ccc3df, #d8d0e6, #e3deed, #eeebf4, #f9f8fb
- Shades (toward black): #785fab, #69519a, #5e4889, #523f78, #473768, #392c54, #2e2343, #221a32, #15101e, #09070d

## Harmonies

- Complementary: #9db36f
- Analogous: #6f7bb3, #a86fb3
- Triadic: #b3866f, #6fb386
- Split-complementary: #b3a86f, #7bb36f
- Tetradic: #b36f7b, #9db36f, #6fb3a8

## Colors that go with #866fb3

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 #866fb3: softer than #000 and cool enough to feel like part of the same palette. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Hermès (https://brandsweets.com/colors/brands/hermes-com), PlayStation® Official Site: Consoles, Games, Accessories & MoreSony Interactive Entertainment (https://brandsweets.com/colors/brands/playstation-com). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #866fb3 in 5 real palettes, including Mastodon hosted on mastodon.social's brand system and Beach Hut, as the accent. Seen in: Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Wired (https://brandsweets.com/colors/brands/wired-com). — https://brandsweets.com/colors/amber
- **Crimson** #dc143c [pool] — Crimson is paired with #866fb3 in 4 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), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), NASCAR (https://brandsweets.com/colors/brands/nascar-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #866fb3: 4 real palettes, including Calm's brand system and Astro's brand system, as the lead colour. Seen in: Calm (https://brandsweets.com/colors/brands/calm-com), Astro (https://brandsweets.com/colors/brands/astro-build), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Telegram (https://brandsweets.com/colors/brands/telegram-org). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #866fb3: 7 real palettes, including Campus and American Express's brand system, as the lead colour. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), American Express (https://brandsweets.com/colors/brands/americanexpress-com), The New York Times (https://brandsweets.com/colors/brands/nytimes-com), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 7 real palettes, including Marvel's brand system and Plaid's brand system put Midnight Blue beside #866fb3, as the supporting colour. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), British Airways (https://brandsweets.com/colors/brands/britishairways-com). — https://brandsweets.com/colors/midnightblue
- **Taupe** #483c32 [pool] — Taupe is paired with #866fb3 in 10 real palettes, including Zed's brand system and Retool's brand system, as that palette's text colour. Seen in: Zed (https://brandsweets.com/colors/brands/zed-dev), Retool (https://brandsweets.com/colors/brands/retool-com), Superhuman (https://brandsweets.com/colors/brands/superhuman-com), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/taupe
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #866fb3 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/olive

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

- On white (#ffffff): 4.25:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #8069b0 (4.6:1); AA: background → #0f0f0f (4.51:1); AAA: text → #624c90 (7.1:1)
- On black (#000000): 4.94:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #9f8dc3 (7.07:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/866fb3-ae9cc4-dfc94e-2a1f2d-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: "#866fb3" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.