# #51108e

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

## Values

- Hex: `#51108e`
- RGB: rgb(81, 16, 142)
- HSL: hsl(271, 80%, 31%)
- OKLCH: oklch(0.368 0.182 299.9)
- Relative luminance: 0.0407
- Nearest named color: Indigo Static (#4b0183, Δ 2.782) — https://brandsweets.com/colors/indigo-static
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/51108e

## Tints & shades

- Tints (toward white): #6313ae, #7316ca, #851ee6, #973eea, #a85eed, #b77af0, #c89af4, #dabaf7, #e9d6fa, #faf6fe
- Shades (toward black): #490e81, #440d77, #3c0c6a, #340a5c, #2f0953, #270845, #1f0637, #180529, #120420, #0a0212

## Harmonies

- Complementary: #4d8e10
- Analogous: #12108e, #8e108c
- Triadic: #8e5110, #108e51
- Split-complementary: #8c8e10, #108e12
- Tetradic: #8e1210, #4d8e10, #108c8e

## Colors that go with #51108e

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 #51108e'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), Discord (https://brandsweets.com/colors/brands/discord), Nivea (https://brandsweets.com/colors/brands/nivea-com), Nokia (https://brandsweets.com/colors/brands/nokia-com). — https://brandsweets.com/colors/royalblue
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #51108e 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
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #51108e: 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), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [pool] — Crimson is paired with #51108e in 3 real palettes, including Wells Fargo's brand system and Casper Sleep's brand system, as the lead colour. Seen in: Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Lenovo (https://brandsweets.com/colors/brands/lenovo-com). — https://brandsweets.com/colors/crimson
- **Midnight Blue** #191970 [pool] — 3 real palettes, including Visa's brand system and Gillette's brand system put Midnight Blue beside #51108e, as the supporting colour. Seen in: Visa (https://brandsweets.com/colors/brands/visa-com), Gillette (https://brandsweets.com/colors/brands/gillette-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/midnightblue
- **Steel Blue** #4682b4 [pool] — Designers have shipped Steel Blue with #51108e: 3 real palettes, including FedEx's brand system and Hershey's's brand system, as the accent. Seen in: FedEx (https://brandsweets.com/colors/brands/fedex-com), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/steelblue
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #51108e — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold). — https://brandsweets.com/colors/teal
- **Sea Green** #2e8b57 [harmony: split] — Sea Green is a split-complement of #51108e: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/seagreen

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

- On white (#ffffff): 11.57:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.81:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9c47eb (4.51:1); AA: background → #a3a3a3 (4.59:1); AAA: text → #b77af0 (7.06:1); AAA: background → #cccccc (7.21:1)

## Brands using this color

- **FedEx** — primary #4d148c (Δ 0.919) — https://brandsweets.com/colors/brands/fedex-com
- **Taco Bell** — primary #501098 (Δ 1.74) — https://brandsweets.com/colors/brands/tacobell-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/51108e-b59cc4-c7cb62-2c1f2d-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: "#51108e" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.