# #381d91

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

## Values

- Hex: `#381d91`
- RGB: rgb(56, 29, 145)
- HSL: hsl(254, 67%, 34%)
- OKLCH: oklch(0.355 0.175 283.7)
- Relative luminance: 0.0376
- Nearest named color: Galactic Civilization (#442288, Δ 3.042) — https://brandsweets.com/colors/galactic-civilization
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/381d91

## Tints & shades

- Tints (toward white): #4222aa, #4d28c8, #5c37d7, #7555dd, #896ee2, #9e88e7, #b6a6ed, #cbbff2, #e3ddf8, #f8f6fd
- Shades (toward black): #331a84, #2e1877, #29156a, #24135e, #1f1051, #1a0d44, #150b37, #10082b, #0b061e, #070311

## Harmonies

- Complementary: #76911d
- Analogous: #1d3c91, #721d91
- Triadic: #91381d, #1d9138
- Split-complementary: #91721d, #3c911d
- Tetradic: #911d3c, #76911d, #1d9172

## Colors that go with #381d91

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Denim** #1560bd [harmony, pool: analogous] — Denim is #381d91's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com), Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Panasonic (https://brandsweets.com/colors/brands/panasonic-com). — https://brandsweets.com/colors/denim
- **Blue** #0000ff [pool] — 4 real palettes, including Procter & Gamble's brand system and Zillow's brand system put Blue beside #381d91, as the supporting colour. Seen in: Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Zillow (https://brandsweets.com/colors/brands/zillow-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Pfizer (https://brandsweets.com/colors/brands/pfizer-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #381d91: 4 real palettes, including Purina Pro Plan's brand system and Zillow's brand system, as the accent. Seen in: Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Zillow (https://brandsweets.com/colors/brands/zillow-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Oreo (https://brandsweets.com/colors/brands/oreo-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #381d91 in 6 real palettes, including Pepsi's brand system and Casper Sleep's brand system, as the supporting colour. Seen in: Pepsi (https://brandsweets.com/colors/brands/pepsi-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Red** #ff0000 [pool] — Red is paired with #381d91 in 4 real palettes, including Walgreens's brand system and Twitch's brand system, as the supporting colour. Seen in: Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Twitch (https://brandsweets.com/colors/brands/twitch-tv), Hyundai (https://brandsweets.com/colors/brands/hyundaiusa-com), 3M (https://brandsweets.com/colors/brands/3m-com). — https://brandsweets.com/colors/red
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #381d91 in 6 real palettes, including Discord's brand system and Nivea's brand system, as the lead colour. Seen in: Discord (https://brandsweets.com/colors/brands/discord), Nivea (https://brandsweets.com/colors/brands/nivea-com), Nokia (https://brandsweets.com/colors/brands/nokia-com), Confluent (https://brandsweets.com/colors/brands/confluent-io). — https://brandsweets.com/colors/royalblue
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #381d91 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
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #381d91: softer than #000 and cool enough to feel like part of the same palette. Seen in: dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/charcoal

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

- On white (#ffffff): 11.98:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.75:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #7f61e0 (4.69:1); AA: background → #a1a1a1 (4.64:1); AAA: text → #9e88e7 (7.13:1); AAA: background → #c7c7c7 (7.09:1)

## Brands using this color

- **dbt Labs** — accent #3d189a (Δ 1.73) — https://brandsweets.com/colors/brands/getdbt-com

## 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/381d91-aa9cc4-dfbb4e-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: "#381d91" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.