# #400c55

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

## Values

- Hex: `#400c55`
- RGB: rgb(64, 12, 85)
- HSL: hsl(283, 75%, 19%)
- OKLCH: oklch(0.288 0.125 313.6)
- Relative luminance: 0.0201
- Nearest named color: Clairvoyant (#480656, Δ 1.872) — https://brandsweets.com/colors/clairvoyant
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/400c55

## Tints & shades

- Tints (toward white): #5b1178, #76169c, #911bc0, #ab24e0, #b848e5, #c467e9, #d28bee, #e0aff4, #eed2f9, #fcf6fe
- Shades (toward black): #3d0b50, #360a47, #330a43, #2c083a, #290836, #22062d, #1e0628, #18041f, #14041b, #0e0312

## Harmonies

- Complementary: #21550c
- Analogous: #1c0c55, #550c45
- Triadic: #55400c, #0c5540
- Split-complementary: #45550c, #0c551c
- Tetradic: #551c0c, #21550c, #0c4555

## Colors that go with #400c55

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

- **Blue** #0000ff [pool] — 4 real palettes, including Sketch's brand system and Monzo's brand system put Blue beside #400c55, as the accent. Seen in: Sketch (https://brandsweets.com/colors/brands/sketch-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Penpot (https://brandsweets.com/colors/brands/penpot-app). — https://brandsweets.com/colors/blue
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #400c55: 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), Dusk (https://brandsweets.com/palettes/cool#dusk), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/cadetblue
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #400c55: softer than #000 and cool enough to feel like part of the same palette. Seen in: Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #400c55: 4 real palettes, including Blue Mono and MLB's brand system, as the lead colour. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), MLB (https://brandsweets.com/colors/brands/mlb-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #400c55 in 5 real palettes, including Marvel's brand system and Casper Sleep's brand system, as the accent. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-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 #400c55: 13 real palettes, including Discover's brand system and Heinz's brand system, as the supporting colour. Seen in: Discover (https://brandsweets.com/colors/brands/discover-com), Heinz (https://brandsweets.com/colors/brands/heinz-com), Open House (https://brandsweets.com/palettes/clean#open-house), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/denim
- **Light Pink** #ffb6c1 [pool] — Light Pink shows up next to #400c55 in 4 real palettes, including Railway's brand system and Sorbet, as the supporting colour. Seen in: Railway (https://brandsweets.com/colors/brands/railway-app), Sorbet (https://brandsweets.com/palettes/light#sorbet), Pastel Pop (https://brandsweets.com/palettes/playful#pastel-pop), Macaron (https://brandsweets.com/palettes/light#macaron). — https://brandsweets.com/colors/lightpink
- **Forest Green** #228b22 [harmony: complementary] — Forest Green sits directly opposite #400c55 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/forestgreen

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

- On white (#ffffff): 14.98:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.4:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #b236e2 (4.52:1); AA: background → #8f8f8f (4.63:1); AAA: text → #ca75eb (7.26:1); AAA: background → #b3b3b3 (7.15:1)

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern
- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/400c55-bb9fc1-b2cb62-2d1f2b-ebe9f1?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: "#400c55" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.