# #391bd0

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

## Values

- Hex: `#391bd0`
- RGB: rgb(57, 27, 208)
- HSL: hsl(250, 77%, 46%)
- OKLCH: oklch(0.425 0.246 275.4)
- Relative luminance: 0.0621
- Nearest named color: Busty Blue (#3300cc, Δ 2.426) — https://brandsweets.com/colors/busty-blue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/391bd0

## Tints & shades

- Tints (toward white): #4222e2, #5538e5, #6c53e9, #806aec, #9381ef, #a697f2, #baaef4, #d1c9f8, #e4dffb, #f7f6fe
- Shades (toward black): #3419be, #2f16ac, #291395, #241183, #1f0f71, #1a0c5f, #150a4d, #0f0736, #0a0524, #050212

## Harmonies

- Complementary: #b2d01b
- Analogous: #1b57d0, #931bd0
- Triadic: #d0391b, #1bd039
- Split-complementary: #d0931b, #57d01b
- Tetradic: #d01b57, #b2d01b, #1bd093

## Colors that go with #391bd0

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 #391bd0: softer than #000 and cool enough to feel like part of the same palette. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Jeep (https://brandsweets.com/colors/brands/jeep-com), HP (https://brandsweets.com/colors/brands/hp-com), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/charcoal
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #391bd0: 6 real palettes, including Qualcomm's brand system and Canva's brand system, as the supporting colour. Seen in: Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Canva (https://brandsweets.com/colors/brands/canva-com), Spotify (https://brandsweets.com/colors/brands/spotify), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #391bd0 in 6 real palettes, including Behance's brand system and Dunkin''s brand system, as the accent. Seen in: Behance (https://brandsweets.com/colors/brands/behance-net), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #391bd0: 5 real palettes, including Unilever's brand system and Intel's brand system, as the accent. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Intel (https://brandsweets.com/colors/brands/intel-com), Pixar (https://brandsweets.com/colors/brands/pixar-com), Activision (https://brandsweets.com/colors/brands/activision-com). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #391bd0: 6 real palettes, including Cargo's brand system and Readymag's brand system, as the lead colour. Seen in: Cargo (https://brandsweets.com/colors/brands/cargo-site), Readymag (https://brandsweets.com/colors/brands/readymag-com), Samsung (https://brandsweets.com/colors/brands/samsung-com), Absolut (https://brandsweets.com/colors/brands/absolut-com). — https://brandsweets.com/colors/dodgerblue
- **Medium Sea Green** #3cb371 [pool] — Medium Sea Green is paired with #391bd0 in 4 real palettes, including Spotify's brand system and Indigo SaaS, as the lead colour. Seen in: Spotify (https://brandsweets.com/colors/brands/spotify), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Unity (https://brandsweets.com/colors/brands/unity-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/mediumseagreen
- **Midnight Blue** #191970 [pool] — 11 real palettes, including Purina Pro Plan's brand system and Kraken's brand system put Midnight Blue beside #391bd0, as the supporting colour. Seen in: Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Kraken (https://brandsweets.com/colors/brands/kraken-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Sketch (https://brandsweets.com/colors/brands/sketch-com). — https://brandsweets.com/colors/midnightblue
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #391bd0 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Intel (https://brandsweets.com/colors/brands/intel-com), Kia (https://brandsweets.com/colors/brands/kia-com), Coinbase (https://brandsweets.com/colors/brands/coinbase). — https://brandsweets.com/colors/seagreen

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

- On white (#ffffff): 9.37:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.24:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #7861ea (4.7:1); AA: background → #b5b5b5 (4.57:1); AAA: text → #9b8af0 (7.29:1); AAA: background → #e0e0e0 (7.1:1)

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- 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/391bd0-a79cc4-dfb14e-281f2d-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: "#391bd0" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.