# #381bf3

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

## Values

- Hex: `#381bf3`
- RGB: rgb(56, 27, 243)
- HSL: hsl(248, 90%, 53%)
- OKLCH: oklch(0.465 0.283 272.3)
- Relative luminance: 0.081
- Nearest named color: Overdue Blue (#4400ff, Δ 2.39) — https://brandsweets.com/colors/overdue-blue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/381bf3

## Tints & shades

- Tints (toward white): #4d34f4, #5e47f5, #735ff7, #8472f8, #998bf9, #aa9efa, #c0b6fb, #d0cafc, #e6e2fd, #f7f5fe
- Shades (toward black): #2a0ce9, #250bd0, #210ab8, #1d08a0, #19078d, #150674, #10055c, #0c0444, #08022c, #030113

## Harmonies

- Complementary: #d6f31b
- Analogous: #1b6af3, #a41bf3
- Triadic: #f3381b, #1bf338
- Split-complementary: #f3a41b, #6af31b
- Tetradic: #f31b6a, #d6f31b, #1bf3a4

## Colors that go with #381bf3

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 #381bf3: 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
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #381bf3: 10 real palettes, including CVS's brand system and Procter & Gamble's brand system, as the accent. Seen in: CVS (https://brandsweets.com/colors/brands/cvs-com), Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Zillow (https://brandsweets.com/colors/brands/zillow-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #381bf3: 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), Roblox (https://brandsweets.com/colors/brands/roblox-com). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #381bf3 in 7 real palettes, including Dunkin''s brand system and Tim Hortons's brand system, as the accent. Seen in: Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Behance (https://brandsweets.com/colors/brands/behance-net), Coinbase (https://brandsweets.com/colors/brands/coinbase). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #381bf3: 6 real palettes, including Pixar's brand system and Activision's brand system, as the supporting colour. Seen in: Pixar (https://brandsweets.com/colors/brands/pixar-com), Activision (https://brandsweets.com/colors/brands/activision-com), Dairy Queen (https://brandsweets.com/colors/brands/dairyqueen-com), Unilever (https://brandsweets.com/colors/brands/unilever-com). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #381bf3: 7 real palettes, including Unity's brand system and Cargo's brand system, as the lead colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Cargo (https://brandsweets.com/colors/brands/cargo-site), Readymag (https://brandsweets.com/colors/brands/readymag-com), Samsung (https://brandsweets.com/colors/brands/samsung-com). — https://brandsweets.com/colors/dodgerblue
- **Medium Sea Green** #3cb371 [pool] — Medium Sea Green is paired with #381bf3 in 5 real palettes, including Unity's brand system and Spotify's brand system, as the accent. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Spotify (https://brandsweets.com/colors/brands/spotify), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Console Light (https://brandsweets.com/palettes/technical#console-light). — https://brandsweets.com/colors/mediumseagreen
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #381bf3 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Kia (https://brandsweets.com/colors/brands/kia-com), Coinbase (https://brandsweets.com/colors/brands/coinbase), Intel (https://brandsweets.com/colors/brands/intel-com). — https://brandsweets.com/colors/seagreen

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

- On white (#ffffff): 8.02:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.62:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #735ff7 (4.71:1); AA: background → #c2c2c2 (4.5:1); AAA: text → #9586f9 (7.06:1); AAA: background → #f0f0f0 (7.04:1)

## 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/381bf3-a69cc4-dfac4e-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: "#381bf3" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.