# #5b288a

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

## Values

- Hex: `#5b288a`
- RGB: rgb(91, 40, 138)
- HSL: hsl(271, 55%, 35%)
- OKLCH: oklch(0.401 0.156 303.9)
- Relative luminance: 0.0558
- Nearest named color: Intergalactic Settlement (#5b1e8b, Δ 1.717) — https://brandsweets.com/colors/intergalactic-settlement
- Moods: cool, modern
- Page: https://brandsweets.com/colors/5b288a

## Tints & shades

- Tints (toward white): #6a2fa2, #7d37be, #8c49ca, #9b61d1, #ac7dd9, #bb94e0, #caace7, #d9c4ee, #ebdff6, #faf7fd
- Shades (toward black): #53257e, #4b2173, #441e67, #3c1a5b, #34174f, #2a123f, #220f33, #1a0b28, #12081c, #0a0510

## Harmonies

- Complementary: #588a28
- Analogous: #2a288a, #8a2889
- Triadic: #8a5b28, #288a5b
- Split-complementary: #898a28, #288a2a
- Tetradic: #8a2a28, #588a28, #28898a

## Colors that go with #5b288a

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 #5b288a in 5 real palettes, including Wells Fargo's brand system and Lenovo's brand system, as the lead colour. Seen in: Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Lenovo (https://brandsweets.com/colors/brands/lenovo-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com). — https://brandsweets.com/colors/crimson
- **Midnight Blue** #191970 [pool] — 5 real palettes, including Kraken's brand system and Fintech Trust put Midnight Blue beside #5b288a, as the lead colour. Seen in: Kraken (https://brandsweets.com/colors/brands/kraken-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), First Snow (https://brandsweets.com/palettes/cool#first-snow). — https://brandsweets.com/colors/midnightblue
- **Tomato** #ff6347 [pool] — 4 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #5b288a, 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 #5b288a 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 #5b288a: 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
- **Denim** #1560bd [pool] — Designers have shipped Denim with #5b288a: 3 real palettes, including Slack's brand system and Hinge's brand system, as the lead colour. Seen in: Slack (https://brandsweets.com/colors/brands/slack-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com). — https://brandsweets.com/colors/denim
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #5b288a'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), Nokia (https://brandsweets.com/colors/brands/nokia-com). — https://brandsweets.com/colors/royalblue
- **Steel Blue** #4682b4 [pool] — Designers have shipped Steel Blue with #5b288a: 3 real palettes, including FedEx's brand system and Fintech Trust, as the accent. Seen in: FedEx (https://brandsweets.com/colors/brands/fedex-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/steelblue

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

- On white (#ffffff): 9.93:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.12:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9659cf (4.63:1); AA: background → #b0b0b0 (4.58:1); AAA: text → #b184db (7.19:1); AAA: background → #d9d9d9 (7.03:1)

## Fonts for this mood

- 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/5b288a-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: "#5b288a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.