# #837fc3

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

## Values

- Hex: `#837fc3`
- RGB: rgb(131, 127, 195)
- HSL: hsl(244, 36%, 63%)
- OKLCH: oklch(0.628 0.101 285.8)
- Relative luminance: 0.2394
- Nearest named color: Aster (#867ba9, Δ 3.87) — https://brandsweets.com/colors/aster
- Moods: cool, modern
- Page: https://brandsweets.com/colors/837fc3

## Tints & shades

- Tints (toward white): #918dc9, #9b97ce, #a8a5d5, #b2afd9, #bfbde0, #c9c8e5, #d7d5eb, #e1e0f0, #eeeef7, #f8f8fc
- Shades (toward black): #6f6ab9, #5b55af, #4f499c, #444087, #3c3776, #312e61, #27244c, #1c1a37, #121023, #07070e

## Harmonies

- Complementary: #bec37f
- Analogous: #7f9cc3, #a57fc3
- Triadic: #c3837f, #7fc383
- Split-complementary: #c3a57f, #9cc37f
- Tetradic: #c37f9c, #bec37f, #7fc3a5

## Colors that go with #837fc3

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 #837fc3: softer than #000 and cool enough to feel like part of the same palette. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Hermès (https://brandsweets.com/colors/brands/hermes-com). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #837fc3 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), Google (https://brandsweets.com/colors/brands/google-com), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 4 real palettes, including Qualcomm's brand system and Readymag's brand system put Blue beside #837fc3, as the accent. Seen in: Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Canva (https://brandsweets.com/colors/brands/canva-com), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/blue
- **Copper** #b87333 [harmony, pool: split] — Copper is a split-complement of #837fc3: 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), Notion (https://brandsweets.com/colors/brands/notion), Atelier (https://brandsweets.com/palettes/elegant#atelier). — https://brandsweets.com/colors/copper
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #837fc3: 5 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 #837fc3: 13 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), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/denim
- **Medium Sea Green** #3cb371 [pool] — Medium Sea Green is paired with #837fc3 in 4 real palettes, including Olympics's brand system and Indigo SaaS, as the accent. Seen in: Olympics (https://brandsweets.com/colors/brands/olympics-com), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/mediumseagreen
- **Midnight Blue** #191970 [pool] — 8 real palettes, including Plaid's brand system and Marvel's brand system put Midnight Blue beside #837fc3, as the supporting colour. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Open House (https://brandsweets.com/palettes/clean#open-house), First Snow (https://brandsweets.com/palettes/cool#first-snow). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 3.63:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #726dba (4.55:1); AA: background → #1f1f1f (4.54:1); AAA: text → #524da3 (7.12:1)
- On black (#000000): 5.79:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #9490cb (7.11:1)

## Fonts for this mood

- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/837fc3-a39cc4-dfa24e-261f2d-e9edf1?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: "#837fc3" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.