# #571d81

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

## Values

- Hex: `#571d81`
- RGB: rgb(87, 29, 129)
- HSL: hsl(275, 63%, 31%)
- OKLCH: oklch(0.375 0.158 306.5)
- Relative luminance: 0.0449
- Nearest named color: Intergalactic Settlement (#5b1e8b, Δ 1.843) — https://brandsweets.com/colors/intergalactic-settlement
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/571d81

## Tints & shades

- Tints (toward white): #6b249e, #7c2ab7, #8f33d1, #9f50d7, #af6ede, #bd86e4, #cda4ea, #ddc1f1, #eadaf7, #faf7fd
- Shades (toward black): #4f1a74, #49196c, #411660, #381353, #33114b, #2a0e3e, #220b32, #190825, #14071d, #0b0411

## Harmonies

- Complementary: #47811d
- Analogous: #261d81, #811d79
- Triadic: #81571d, #1d8157
- Split-complementary: #79811d, #1d8126
- Tetradic: #81261d, #47811d, #1d7981

## Colors that go with #571d81

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

- **Crimson** #dc143c [pool] — Crimson is paired with #571d81 in 4 real palettes, including Lenovo's brand system and Wells Fargo's brand system, as the supporting colour. Seen in: Lenovo (https://brandsweets.com/colors/brands/lenovo-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #571d81'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). — https://brandsweets.com/colors/royalblue
- **Tomato** #ff6347 [pool] — 4 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #571d81, 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 #571d81 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 #571d81: 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 Gillette's brand system and Visa's brand system put Midnight Blue beside #571d81, 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). — https://brandsweets.com/colors/midnightblue
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #571d81 — 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 #571d81: 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): 11.06:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.9:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9f50d7 (4.6:1); AA: background → #a6a6a6 (4.55:1); AAA: text → #b87ee2 (7.12:1); AAA: background → #cfcfcf (7.1:1)

## 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/571d81-b89cc4-c0cb62-2d1f2d-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: "#571d81" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.