# #511eb8

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

## Values

- Hex: `#511eb8`
- RGB: rgb(81, 30, 184)
- HSL: hsl(260, 72%, 42%)
- OKLCH: oklch(0.421 0.215 288.1)
- Relative luminance: 0.0614
- Nearest named color: Blurple (#5539cc, Δ 5.599) — https://brandsweets.com/colors/blurple
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/511eb8

## Tints & shades

- Tints (toward white): #5d22d3, #6a31dd, #7d4be2, #8d61e5, #a07bea, #b396ee, #c3acf1, #d6c6f6, #e6dcf9, #f9f6fe
- Shades (toward black): #4a1ba7, #421895, #3c1688, #341376, #2d1065, #250e53, #1d0b42, #170935, #100623, #080312

## Harmonies

- Complementary: #85b81e
- Analogous: #1e38b8, #9f1eb8
- Triadic: #b8511e, #1eb851
- Split-complementary: #b89f1e, #38b81e
- Tetradic: #b81e38, #85b81e, #1eb89f

## Colors that go with #511eb8

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 #511eb8: 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), Campus (https://brandsweets.com/palettes/friendly#campus), HP (https://brandsweets.com/colors/brands/hp-com). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #511eb8's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: NHL (https://brandsweets.com/colors/brands/nhl-com), Behance (https://brandsweets.com/colors/brands/behance-net), Wayfair (https://brandsweets.com/colors/brands/wayfair-com), Nivea (https://brandsweets.com/colors/brands/nivea-com). — https://brandsweets.com/colors/royalblue
- **Crimson** #dc143c [pool] — Crimson is paired with #511eb8 in 4 real palettes, including Wells Fargo's brand system and Gemstone, as the lead colour. Seen in: Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Behance (https://brandsweets.com/colors/brands/behance-net), Walgreens (https://brandsweets.com/colors/brands/walgreens-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #511eb8: 6 real palettes, including Unilever's brand system and Warbyparker's brand system, as the accent. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com), Slack (https://brandsweets.com/colors/brands/slack-com), Intel (https://brandsweets.com/colors/brands/intel-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 8 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #511eb8, as the lead colour. Seen in: Kraken (https://brandsweets.com/colors/brands/kraken-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Air France (https://brandsweets.com/colors/brands/airfrance-com). — https://brandsweets.com/colors/midnightblue
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #511eb8 in 5 real palettes, including Tide's brand system and Prepare your taste buds...'s brand system, as the accent. Seen in: Tide (https://brandsweets.com/colors/brands/tide-com), Prepare your taste buds... (https://brandsweets.com/colors/brands/grubhub-com), Soundcloud (https://brandsweets.com/colors/brands/soundcloud-com), NASA (https://brandsweets.com/colors/brands/nasa-gov). — https://brandsweets.com/colors/orangered
- **Tomato** #ff6347 [pool] — 5 real palettes, including dbt Labs's brand system and FedEx's brand system put Tomato beside #511eb8, as the lead colour. Seen in: dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), FedEx (https://brandsweets.com/colors/brands/fedex-com), Etsy (https://brandsweets.com/colors/brands/etsy-com), GitLab (https://brandsweets.com/colors/brands/gitlab). — https://brandsweets.com/colors/tomato
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #511eb8 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): 9.43:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.23:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #8758e4 (4.55:1); AA: background → #b5b5b5 (4.6:1); AAA: text → #a684eb (7.12:1); AAA: background → #dedede (7.01:1)

## Brands using this color

- **Xfinity** — secondary #5a23b9 (Δ 1.964) — https://brandsweets.com/colors/brands/xfinity-com

## 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/511eb8-ae9cc4-dfc94e-2a1f2d-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: "#511eb8" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.