# #5b1bbb

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

## Values

- Hex: `#5b1bbb`
- RGB: rgb(91, 27, 187)
- HSL: hsl(264, 75%, 42%)
- OKLCH: oklch(0.432 0.22 292.2)
- Relative luminance: 0.066
- Nearest named color: Blurple (#5539cc, Δ 5.393) — https://brandsweets.com/colors/blurple
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/5b1bbb

## Tints & shades

- Tints (toward white): #681fd6, #752de1, #8748e5, #955ee8, #a779ec, #b994f0, #c7aaf3, #d9c5f7, #e8dbfa, #f9f6fe
- Shades (toward black): #5218aa, #4a1698, #43148a, #3b1178, #320f67, #290c55, #210a43, #1a0836, #110524, #090312

## Harmonies

- Complementary: #7bbb1b
- Analogous: #1b2bbb, #ab1bbb
- Triadic: #bb5b1b, #1bbb5b
- Split-complementary: #bbab1b, #2bbb1b
- Tetradic: #bb1b2b, #7bbb1b, #1bbbab

## Colors that go with #5b1bbb

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

- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #5b1bbb's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Wayfair (https://brandsweets.com/colors/brands/wayfair-com), NHL (https://brandsweets.com/colors/brands/nhl-com), Behance (https://brandsweets.com/colors/brands/behance-net), Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com). — https://brandsweets.com/colors/royalblue
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #5b1bbb: 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). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [pool] — Crimson is paired with #5b1bbb in 4 real palettes, including Gemstone and Wells Fargo's brand system, as the accent. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), 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 #5b1bbb: 5 real palettes, including Slack's brand system and Unilever's brand system, as the lead colour. Seen in: Slack (https://brandsweets.com/colors/brands/slack-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Linkedin (https://brandsweets.com/colors/brands/linkedin-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 5 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #5b1bbb, 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
- **Tomato** #ff6347 [pool] — 5 real palettes, including dbt Labs's brand system and FedEx's brand system put Tomato beside #5b1bbb, as the lead colour. Seen in: dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), FedEx (https://brandsweets.com/colors/brands/fedex-com), GitLab (https://brandsweets.com/colors/brands/gitlab), Etsy (https://brandsweets.com/colors/brands/etsy-com). — https://brandsweets.com/colors/tomato
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #5b1bbb 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 #5b1bbb: 3 real palettes, including Zillow's brand system and Unilever's brand system, as the supporting colour. Seen in: Zillow (https://brandsweets.com/colors/brands/zillow-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Oreo (https://brandsweets.com/colors/brands/oreo-com). — https://brandsweets.com/colors/cobalt

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

- On white (#ffffff): 9.05:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.32:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9055e7 (4.64:1); AA: background → #b8b8b8 (4.56:1); AAA: text → #ad82ed (7.19:1); AAA: background → #e3e3e3 (7.06:1)

## Brands using this color

- **Xfinity** — secondary #5a23b9 (Δ 0.929) — https://brandsweets.com/colors/brands/xfinity-com
- **Twitch** — secondary #5c16c5 (Δ 1.598) — https://brandsweets.com/colors/brands/twitch-tv
- **Kraken** — secondary #5c29be (Δ 1.914) — https://brandsweets.com/colors/brands/kraken-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/5b1bbb-b19cc4-dfd34e-2b1f2d-e9eaf1?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: "#5b1bbb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.