# #310bcb

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

## Values

- Hex: `#310bcb`
- RGB: rgb(49, 11, 203)
- HSL: hsl(252, 90%, 42%)
- OKLCH: oklch(0.404 0.25 273.7)
- Relative luminance: 0.052
- Nearest named color: Busty Blue (#3300cc, Δ 0.521) — https://brandsweets.com/colors/busty-blue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/310bcb

## Tints & shades

- Tints (toward white): #380ce9, #461bf3, #5e38f5, #7251f6, #896ef7, #a18bf9, #b4a3fa, #ccc0fc, #e0d8fd, #f7f5fe
- Shades (toward black): #2d0ab8, #2809a5, #240896, #200783, #1b066f, #16055c, #120449, #0e033a, #090227, #050113

## Harmonies

- Complementary: #a5cb0b
- Analogous: #0b45cb, #920bcb
- Triadic: #cb310b, #0bcb31
- Split-complementary: #cb920b, #45cb0b
- Tetradic: #cb0b45, #a5cb0b, #0bcb92

## Colors that go with #310bcb

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 #310bcb: 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), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), HP (https://brandsweets.com/colors/brands/hp-com). — https://brandsweets.com/colors/charcoal
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #310bcb: 5 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 #310bcb in 4 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), Pepsi (https://brandsweets.com/colors/brands/pepsi-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #310bcb: 6 real palettes, including Unilever's brand system and Activision's brand system, as the accent. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Activision (https://brandsweets.com/colors/brands/activision-com), Intel (https://brandsweets.com/colors/brands/intel-com), Pixar (https://brandsweets.com/colors/brands/pixar-com). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #310bcb: 6 real palettes, including Absolut's brand system and Cargo's brand system, as the supporting colour. Seen in: Absolut (https://brandsweets.com/colors/brands/absolut-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 #310bcb in 4 real palettes, including Spotify's brand system and Unity's brand system, as the lead colour. Seen in: Spotify (https://brandsweets.com/colors/brands/spotify), Unity (https://brandsweets.com/colors/brands/unity-com), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/mediumseagreen
- **Midnight Blue** #191970 [pool] — 11 real palettes, including Monzo's brand system and Sketch's brand system put Midnight Blue beside #310bcb, as the lead colour. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Sketch (https://brandsweets.com/colors/brands/sketch-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), MLB (https://brandsweets.com/colors/brands/mlb-com). — https://brandsweets.com/colors/midnightblue
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #310bcb 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

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

- On white (#ffffff): 10.29:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.04:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #795af6 (4.61:1); AA: background → #adadad (4.59:1); AAA: text → #9d86f9 (7.21:1); AAA: background → #d6d6d6 (7.08:1)

## 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/310bcb-a99cc4-dfb64e-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: "#310bcb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.