# #3d2178

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

## Values

- Hex: `#3d2178`
- RGB: rgb(61, 33, 120)
- HSL: hsl(259, 57%, 30%)
- OKLCH: oklch(0.34 0.139 292.1)
- Relative luminance: 0.0344
- Nearest named color: Explorer of the Galaxies (#3a1f76, Δ 0.836) — https://brandsweets.com/colors/explorer-of-the-galaxies
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/3d2178

## Tints & shades

- Tints (toward white): #4b2994, #5930b0, #6537c8, #7a53d0, #906fd8, #a68bdf, #bba7e7, #cebfed, #e3dbf5, #f9f7fd
- Shades (toward black): #361e6c, #321b64, #2c1858, #281650, #221344, #1c0f38, #180d30, #120a24, #0e081c, #080410

## Harmonies

- Complementary: #5c7821
- Analogous: #213178, #682178
- Triadic: #783d21, #21783d
- Split-complementary: #786821, #317821
- Tetradic: #782131, #5c7821, #217868

## Colors that go with #3d2178

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

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #3d2178: 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), Boeing (https://brandsweets.com/colors/brands/boeing-com), CeraVe (https://brandsweets.com/colors/brands/cerave-com), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #3d2178's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Discord (https://brandsweets.com/colors/brands/discord), Confluent (https://brandsweets.com/colors/brands/confluent-io), Nokia (https://brandsweets.com/colors/brands/nokia-com), Nivea (https://brandsweets.com/colors/brands/nivea-com). — https://brandsweets.com/colors/royalblue
- **Blue** #0000ff [pool] — 4 real palettes, including Alaska Airlines's brand system and Procter & Gamble's brand system put Blue beside #3d2178, as the accent. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Sketch (https://brandsweets.com/colors/brands/sketch-com), Zillow (https://brandsweets.com/colors/brands/zillow-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #3d2178 in 7 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour. Seen in: Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #3d2178: 11 real palettes, including Panasonic's brand system and Bank of America's brand system, as the accent. Seen in: Panasonic (https://brandsweets.com/colors/brands/panasonic-com), Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/denim
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #3d2178: 4 real palettes, including Glacier and Frost & Ember, as the supporting colour. Seen in: Glacier (https://brandsweets.com/palettes/cool#glacier), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), First Snow (https://brandsweets.com/palettes/cool#first-snow), Macaron (https://brandsweets.com/palettes/light#macaron). — https://brandsweets.com/colors/powderblue
- **Steel Blue** #4682b4 [pool] — Designers have shipped Steel Blue with #3d2178: 7 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), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/steelblue
- **Taupe** #483c32 [pool] — Taupe is paired with #3d2178 in 4 real palettes, including Gillette's brand system and American Eagle's brand system, as the lead colour. Seen in: Gillette (https://brandsweets.com/colors/brands/gillette-com), American Eagle (https://brandsweets.com/colors/brands/ae-com), Boeing (https://brandsweets.com/colors/brands/boeing-com), Datadog (https://brandsweets.com/colors/brands/datadoghq-com). — https://brandsweets.com/colors/taupe

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

- On white (#ffffff): 12.45:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.69:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #845fd3 (4.56:1); AA: background → #9c9c9c (4.53:1); AAA: text → #a387de (7.08:1); AAA: background → #c4c4c4 (7.14:1)

## 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/3d2178-ad9cc4-dfc74e-2a1f2d-e9ebf1?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: "#3d2178" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.