# #581c5a

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

## Values

- Hex: `#581c5a`
- RGB: rgb(88, 28, 90)
- HSL: hsl(298, 53%, 23%)
- OKLCH: oklch(0.347 0.121 326.5)
- Relative luminance: 0.0364
- Nearest named color: Cosmic Explorer (#551155, Δ 2.175) — https://brandsweets.com/colors/cosmic-explorer
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/581c5a

## Tints & shades

- Tints (toward white): #762579, #912e94, #af37b3, #c248c7, #cd67d0, #d682d9, #e0a1e2, #e9bdeb, #f3dcf4, #fcf7fd
- Shades (toward black): #501952, #48174a, #411442, #39123b, #351137, #2e0e2f, #260c27, #1e0a1f, #170717, #0f0510

## Harmonies

- Complementary: #1e5a1c
- Analogous: #391c5a, #5a1c3d
- Triadic: #5a581c, #1c5a58
- Split-complementary: #3d5a1c, #1c5a39
- Tetradic: #5a391c, #1e5a1c, #1c3d5a

## Colors that go with #581c5a

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

- **Sea Green** #2e8b57 [harmony, pool: complementary] — Sea Green sits directly opposite #581c5a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/seagreen
- **Crimson** #dc143c [pool] — Crimson is paired with #581c5a 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
- **Denim** #1560bd [pool] — Designers have shipped Denim with #581c5a: 4 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), Discover (https://brandsweets.com/colors/brands/discover-com). — https://brandsweets.com/colors/denim
- **Tomato** #ff6347 [pool] — 4 real palettes, including Golden Hour and FedEx's brand system put Tomato beside #581c5a, 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
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #581c5a: 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
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #581c5a: 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 #581c5a, 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 #581c5a: 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): 12.15:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.73:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #bf3cc3 (4.65:1); AA: background → #9e9e9e (4.53:1); AAA: text → #d173d4 (7.11:1); AAA: background → #c7c7c7 (7.19:1)

## 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/581c5a-c19fbe-98cb62-2d1f28-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: "#581c5a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.