# #421a61

A color — cool, dark, luxury, bold, modern. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#421a61`
- RGB: rgb(66, 26, 97)
- HSL: hsl(274, 58%, 24%)
- OKLCH: oklch(0.317 0.121 306.5)
- Relative luminance: 0.0276
- Nearest named color: Fading Horizon (#442266, Δ 1.976) — https://brandsweets.com/colors/fading-horizon
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/421a61

## Tints & shades

- Tints (toward white): #55217d, #6b2a9d, #7e31b9, #9346ce, #a362d5, #b47edd, #c79ee5, #d7bbed, #eadbf5, #faf7fd
- Shades (toward black): #3c1859, #371551, #311349, #2c1140, #260f38, #210d30, #1b0b28, #160920, #100618, #0b0410

## Harmonies

- Complementary: #38611a
- Analogous: #1e1a61, #611a5c
- Triadic: #61421a, #1a6142
- Split-complementary: #5c611a, #1a611e
- Tetradic: #611e1a, #38611a, #1a5c61

## Colors that go with #421a61

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 #421a61: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #421a61: 4 real palettes, including SoFi's brand system and Open House, as the supporting colour. Seen in: SoFi (https://brandsweets.com/colors/brands/sofi-com), Open House (https://brandsweets.com/palettes/clean#open-house), Coastal (https://brandsweets.com/palettes/cool#coastal), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Crimson** #dc143c [pool] — Crimson is paired with #421a61 in 5 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour. Seen in: Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #421a61: 14 real palettes, including Discover's brand system and Hinge's brand system, as the supporting colour. Seen in: Discover (https://brandsweets.com/colors/brands/discover-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Panasonic (https://brandsweets.com/colors/brands/panasonic-com), Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com). — https://brandsweets.com/colors/denim
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #421a61 in 4 real palettes, including Audi's brand system and Tumblr's brand system, as the accent. Seen in: Audi (https://brandsweets.com/colors/brands/audi-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Tide (https://brandsweets.com/colors/brands/tide-com). — https://brandsweets.com/colors/orangered
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #421a61: 5 real palettes, including Frost & Ember and Macaron, as the supporting colour. Seen in: Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Macaron (https://brandsweets.com/palettes/light#macaron), Sorbet (https://brandsweets.com/palettes/light#sorbet), Opera (https://brandsweets.com/colors/brands/opera-com). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #421a61 in 7 real palettes, including Confluent's brand system and Discord's brand system, as the supporting colour. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Discord (https://brandsweets.com/colors/brands/discord), Docker (https://brandsweets.com/colors/brands/docker-com), Telehealth (https://brandsweets.com/palettes/modern#telehealth). — https://brandsweets.com/colors/royalblue
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #421a61 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): 13.53:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.55:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9a52d1 (4.5:1); AA: background → #969696 (4.57:1); AAA: text → #b682de (7.24:1); AAA: background → #bdbdbd (7.2:1)

## Fonts for this mood

- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold
- 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/421a61-b79cc4-c2cb62-2d1f2d-eae9f1?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: "#421a61" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.