# #837cbb

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

## Values

- Hex: `#837cbb`
- RGB: rgb(131, 124, 187)
- HSL: hsl(247, 32%, 61%)
- OKLCH: oklch(0.618 0.094 288.4)
- Relative luminance: 0.2283
- Nearest named color: Aster (#867ba9, Δ 2.744) — https://brandsweets.com/colors/aster
- Moods: cool, muted
- Page: https://brandsweets.com/colors/837cbb

## Tints & shades

- Tints (toward white): #9089c2, #9993c8, #a6a1ce, #b3aed5, #bfbcdc, #c9c6e2, #d6d3e8, #e2e1ef, #ecebf5, #f9f8fc
- Shades (toward black): #7068b1, #6057a8, #554c94, #494280, #40396f, #342f5b, #282447, #1d1a32, #131122, #08070d

## Harmonies

- Complementary: #b4bb7c
- Analogous: #7c94bb, #a37cbb
- Triadic: #bb837c, #7cbb83
- Split-complementary: #bba37c, #94bb7c
- Tetradic: #bb7c94, #b4bb7c, #7cbba3

## Colors that go with #837cbb

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 #837cbb: 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 #837cbb in 6 real palettes, including Blueprint and Mastodon hosted on mastodon.social's brand system, as the accent. Seen in: Blueprint (https://brandsweets.com/palettes/technical#blueprint), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Copper** #b87333 [harmony, pool: split] — Copper is a split-complement of #837cbb: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Atelier (https://brandsweets.com/palettes/elegant#atelier), Notion (https://brandsweets.com/colors/brands/notion). — https://brandsweets.com/colors/copper
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #837cbb: 6 real palettes, including Blueprint and Telegram's brand system, as the lead colour. Seen in: Blueprint (https://brandsweets.com/palettes/technical#blueprint), Telegram (https://brandsweets.com/colors/brands/telegram-org), Astro (https://brandsweets.com/colors/brands/astro-build), Calm (https://brandsweets.com/colors/brands/calm-com). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #837cbb: 9 real palettes, including Dusk and Campus, as the lead colour. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), 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). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 6 real palettes, including Plaid's brand system and Marvel's brand system put Midnight Blue beside #837cbb, as the supporting colour. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Discover (https://brandsweets.com/colors/brands/discover-com). — https://brandsweets.com/colors/midnightblue
- **Orange** #ffa500 [pool] — 4 real palettes, including Campus and Graphite put Orange beside #837cbb, as the accent. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), Graphite (https://brandsweets.com/palettes/technical#graphite), Olympics (https://brandsweets.com/colors/brands/olympics-com), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/orange
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #837cbb in 4 real palettes, including Google's brand system and Substack's brand system, as the supporting colour. Seen in: Google (https://brandsweets.com/colors/brands/google-com), Substack (https://brandsweets.com/colors/brands/substack-com), Launch Orange (https://brandsweets.com/palettes/bold#launch-orange), Readymag (https://brandsweets.com/colors/brands/readymag-com). — https://brandsweets.com/colors/orangered

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

- On white (#ffffff): 3.77:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #766eb4 (4.51:1); AA: background → #1c1c1c (4.52:1); AAA: text → #574e97 (7.14:1)
- On black (#000000): 5.57:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #9690c6 (7.1:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/837cbb-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: "#837cbb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.