# #511d72

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

## Values

- Hex: `#511d72`
- RGB: rgb(81, 29, 114)
- HSL: hsl(277, 59%, 28%)
- OKLCH: oklch(0.355 0.141 308.8)
- Relative luminance: 0.0384
- Nearest named color: Elegant Purple Gown (#552367, Δ 2.582) — https://brandsweets.com/colors/elegant-purple-gown
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/511d72

## Tints & shades

- Tints (toward white): #66258e, #7a2caa, #8e33c7, #9e4dd1, #ae69d8, #bd85e0, #cca2e7, #dcbeee, #ebdbf6, #fbf7fd
- Shades (toward black): #4b1b69, #43185d, #3d1655, #341349, #2e1141, #290f39, #200c2d, #1a0924, #110618, #0c0410

## Harmonies

- Complementary: #3e721d
- Analogous: #271d72, #721d68
- Triadic: #72511d, #1d7251
- Split-complementary: #68721d, #1d7227
- Tetradic: #72271d, #3e721d, #1d6872

## Colors that go with #511d72

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 #511d72: 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), Tumblr (https://brandsweets.com/colors/brands/tumblr-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [pool] — Crimson is paired with #511d72 in 6 real palettes, including Lenovo's brand system and Casper Sleep's brand system, as the supporting colour. Seen in: Lenovo (https://brandsweets.com/colors/brands/lenovo-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com). — https://brandsweets.com/colors/crimson
- **Midnight Blue** #191970 [pool] — 4 real palettes, including Gillette's brand system and Visa's brand system put Midnight Blue beside #511d72, as the supporting colour. Seen in: Gillette (https://brandsweets.com/colors/brands/gillette-com), Visa (https://brandsweets.com/colors/brands/visa-com), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/midnightblue
- **Tomato** #ff6347 [pool] — 4 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #511d72, as the supporting colour. Seen in: FedEx (https://brandsweets.com/colors/brands/fedex-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Golden Hour (https://brandsweets.com/palettes/warm#golden-hour), Harley-Davidson (https://brandsweets.com/colors/brands/harley-davidson-com). — https://brandsweets.com/colors/tomato
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #511d72 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
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #511d72: 3 real palettes, including Zillow's brand system and Purina Pro Plan's brand system, as the supporting colour. Seen in: Zillow (https://brandsweets.com/colors/brands/zillow-com), Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #511d72: 3 real palettes, including Hinge's brand system and Slack's brand system, as the accent. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Slack (https://brandsweets.com/colors/brands/slack-com), Panasonic (https://brandsweets.com/colors/brands/panasonic-com). — https://brandsweets.com/colors/denim
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #511d72 in 3 real palettes, including Discord's brand system and Wayfair's brand system, as the lead colour. Seen in: Discord (https://brandsweets.com/colors/brands/discord), Wayfair (https://brandsweets.com/colors/brands/wayfair-com), Confluent (https://brandsweets.com/colors/brands/confluent-io). — https://brandsweets.com/colors/royalblue

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

- On white (#ffffff): 11.87:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.77:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #a051d2 (4.6:1); AA: background → #a1a1a1 (4.6:1); AAA: text → #b97dde (7.05:1); AAA: background → #c7c7c7 (7.02:1)

## 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/511d72-b99cc4-bdcb62-2d1f2c-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: "#511d72" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.