# #591b5a

A color — cool, dark, luxury, bold, modern. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#591b5a`
- RGB: rgb(89, 27, 90)
- HSL: hsl(299, 54%, 23%)
- OKLCH: oklch(0.348 0.123 327.2)
- Relative luminance: 0.0365
- Nearest named color: Cosmic Explorer (#551155, Δ 2.122) — https://brandsweets.com/colors/cosmic-explorer
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/591b5a

## Tints & shades

- Tints (toward white): #78247a, #932d95, #b336b5, #c646c8, #cf66d1, #d881d9, #e2a1e3, #eabceb, #f4dcf4, #fdf7fd
- Shades (toward black): #521952, #4a164b, #421443, #3a123b, #361037, #2f0e2f, #270c27, #1f091f, #170718, #100510

## Harmonies

- Complementary: #1c5a1b
- Analogous: #3a1b5a, #5a1b3c
- Triadic: #5a591b, #1b5a59
- Split-complementary: #3c5a1b, #1b5a3a
- Tetradic: #5a3a1b, #1c5a1b, #1b3c5a

## Colors that go with #591b5a

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 #591b5a in 5 real palettes, including Lenovo's brand system and Marvel's brand system, as the supporting colour. Seen in: Lenovo (https://brandsweets.com/colors/brands/lenovo-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com). — https://brandsweets.com/colors/crimson
- **Tomato** #ff6347 [pool] — 4 real palettes, including Golden Hour and FedEx's brand system put Tomato beside #591b5a, as the supporting colour. Seen in: Golden Hour (https://brandsweets.com/palettes/warm#golden-hour), FedEx (https://brandsweets.com/colors/brands/fedex-com), Harley-Davidson (https://brandsweets.com/colors/brands/harley-davidson-com), Hermès (https://brandsweets.com/colors/brands/hermes-com). — https://brandsweets.com/colors/tomato
- **Sea Green** #2e8b57 [harmony: complementary] — Sea Green sits directly opposite #591b5a 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/seagreen
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #591b5a: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Tumblr (https://brandsweets.com/colors/brands/tumblr-com). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #591b5a: 3 real palettes, including Hinge's brand system and Heinz's brand system, as the accent. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Heinz (https://brandsweets.com/colors/brands/heinz-com), Slack (https://brandsweets.com/colors/brands/slack-com). — https://brandsweets.com/colors/denim
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #591b5a: 3 real palettes, including Macaron and Sorbet, as the supporting colour. Seen in: Macaron (https://brandsweets.com/palettes/light#macaron), Sorbet (https://brandsweets.com/palettes/light#sorbet), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember). — https://brandsweets.com/colors/powderblue
- **Slate Gray** #708090 [pool] — 3 real palettes, including Bloomberg's brand system and Hermès's brand system put Slate Gray beside #591b5a, as the accent. Seen in: Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Hermès (https://brandsweets.com/colors/brands/hermes-com), PlayStation® Official Site: Consoles, Games, Accessories & MoreSony Interactive Entertainment (https://brandsweets.com/colors/brands/playstation-com). — https://brandsweets.com/colors/slategray
- **Teal** #008080 [harmony: split] — Teal is a split-complement of #591b5a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/teal

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

- On white (#ffffff): 12.14:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.73:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #be39c0 (4.54:1); AA: background → #9e9e9e (4.53:1); AAA: text → #d372d5 (7.14:1); AAA: background → #c7c7c7 (7.18:1)

## Fonts for this mood

- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold
- 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/591b5a-c19fbd-96cb62-2d1f27-ede9f1?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: "#591b5a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.