# #421cb5

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

## Values

- Hex: `#421cb5`
- RGB: rgb(66, 28, 181)
- HSL: hsl(255, 73%, 41%)
- OKLCH: oklch(0.402 0.215 282.2)
- Relative luminance: 0.0532
- Nearest named color: Galactic Highway (#3311bb, Δ 3.193) — https://brandsweets.com/colors/galactic-highway
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/421cb5

## Tints & shades

- Tints (toward white): #4c20cf, #582bde, #6d46e2, #8260e6, #977bea, #a891ee, #bdabf2, #d2c6f6, #e3dcf9, #f8f6fe
- Shades (toward black): #3c19a3, #371796, #311584, #2a1273, #251065, #1f0d54, #180a42, #120831, #0d0623, #060312

## Harmonies

- Complementary: #8fb51c
- Analogous: #1c42b5, #8f1cb5
- Triadic: #b5421c, #1cb542
- Split-complementary: #b58f1c, #42b51c
- Tetradic: #b51c42, #8fb51c, #1cb58f

## Colors that go with #421cb5

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 #421cb5: 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), UEFA (https://brandsweets.com/colors/brands/uefa-com), HP (https://brandsweets.com/colors/brands/hp-com), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [harmony, pool: analogous] — Denim is #421cb5's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com), Intel (https://brandsweets.com/colors/brands/intel-com), Pixar (https://brandsweets.com/colors/brands/pixar-com). — https://brandsweets.com/colors/denim
- **Blue** #0000ff [pool] — 4 real palettes, including Zillow's brand system and Procter & Gamble's brand system put Blue beside #421cb5, as the lead colour. Seen in: Zillow (https://brandsweets.com/colors/brands/zillow-com), Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Pfizer (https://brandsweets.com/colors/brands/pfizer-com), CVS (https://brandsweets.com/colors/brands/cvs-com). — https://brandsweets.com/colors/blue
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #421cb5: 5 real palettes, including Peacock's brand system and Blue Mono, as the accent. Seen in: Peacock (https://brandsweets.com/colors/brands/peacocktv-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Canva (https://brandsweets.com/colors/brands/canva-com). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #421cb5 in 6 real palettes, including Behance's brand system and Walgreens's brand system, as the accent. Seen in: Behance (https://brandsweets.com/colors/brands/behance-net), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Pepsi (https://brandsweets.com/colors/brands/pepsi-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com). — https://brandsweets.com/colors/crimson
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #421cb5: 4 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
- **Midnight Blue** #191970 [pool] — 10 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #421cb5, as the lead colour. Seen in: Kraken (https://brandsweets.com/colors/brands/kraken-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Air France (https://brandsweets.com/colors/brands/airfrance-com), Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com). — https://brandsweets.com/colors/midnightblue
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #421cb5 in 8 real palettes, including Tide's brand system and Intercom's brand system, as the accent. Seen in: Tide (https://brandsweets.com/colors/brands/tide-com), Intercom (https://brandsweets.com/colors/brands/intercom-com), NASA (https://brandsweets.com/colors/brands/nasa-gov), Soundcloud (https://brandsweets.com/colors/brands/soundcloud-com). — https://brandsweets.com/colors/orangered

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

- On white (#ffffff): 10.17:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.06:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #7e5ce6 (4.56:1); AA: background → #adadad (4.53:1); AAA: text → #a188ec (7.25:1); AAA: background → #d9d9d9 (7.2:1)

## 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/421cb5-ab9cc4-dfbd4e-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: "#421cb5" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.