# #51148a

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

## Values

- Hex: `#51148a`
- RGB: rgb(81, 20, 138)
- HSL: hsl(271, 75%, 31%)
- OKLCH: oklch(0.367 0.175 300.9)
- Relative luminance: 0.0408
- Nearest named color: Indigo Static (#4b0183, Δ 2.684) — https://brandsweets.com/colors/indigo-static
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/51148a

## Tints & shades

- Tints (toward white): #6318aa, #731cc4, #8524e0, #9744e4, #a863e9, #b77eed, #c89df1, #dabcf5, #e9d7f9, #faf6fe
- Shades (toward black): #49127d, #441174, #3c0f67, #340d59, #2f0b50, #270a43, #1f0836, #180628, #12041f, #0a0312

## Harmonies

- Complementary: #4d8a14
- Analogous: #16148a, #8a1488
- Triadic: #8a5114, #148a51
- Split-complementary: #888a14, #148a16
- Tetradic: #8a1614, #4d8a14, #14888a

## Colors that go with #51148a

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 #51148a'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), Nokia (https://brandsweets.com/colors/brands/nokia-com), Nivea (https://brandsweets.com/colors/brands/nivea-com). — https://brandsweets.com/colors/royalblue
- **Crimson** #dc143c [pool] — Crimson is paired with #51148a in 4 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), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #51148a 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 #51148a: 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
- **Midnight Blue** #191970 [pool] — 3 real palettes, including Visa's brand system and Gillette's brand system put Midnight Blue beside #51148a, 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 #51148a: 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 #51148a — 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 #51148a: 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): 11.56:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.82:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9c4ce6 (4.59:1); AA: background → #a3a3a3 (4.58:1); AAA: text → #b77eed (7.22:1); AAA: background → #cccccc (7.2:1)

## Brands using this color

- **FedEx** — primary #4d148c (Δ 0.96) — https://brandsweets.com/colors/brands/fedex-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/51148a-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: "#51148a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.