# #503d8a

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

## Values

- Hex: `#503d8a`
- RGB: rgb(80, 61, 138)
- HSL: hsl(255, 39%, 39%)
- OKLCH: oklch(0.421 0.123 291.6)
- Relative luminance: 0.0688
- Nearest named color: darkslateblue (#483d8b, Δ 1.392) — https://brandsweets.com/colors/darkslateblue
- Moods: cool, modern
- Page: https://brandsweets.com/colors/503d8a

## Tints & shades

- Tints (toward white): #5c46a0, #6a51b3, #7c67bc, #8e7cc5, #a191cf, #b0a3d7, #c2b8e0, #d4cde9, #e7e3f3, #f9f8fc
- Shades (toward black): #4a3880, #423271, #3c2d67, #332759, #2d224e, #251c40, #1f1735, #171127, #100c1c, #08060e

## Harmonies

- Complementary: #778a3d
- Analogous: #3d508a, #773d8a
- Triadic: #8a503d, #3d8a50
- Split-complementary: #8a773d, #508a3d
- Tetradic: #8a3d50, #778a3d, #3d8a77

## Colors that go with #503d8a

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 #503d8a: softer than #000 and cool enough to feel like part of the same palette. Seen in: Harbour (https://brandsweets.com/palettes/cool#harbour), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Tumblr (https://brandsweets.com/colors/brands/tumblr-com). — https://brandsweets.com/colors/charcoal
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #503d8a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. 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), Hershey's (https://brandsweets.com/colors/brands/hersheys-com). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 6 real palettes, including CVS's brand system and Tesco's brand system put Blue beside #503d8a, as the supporting colour. Seen in: CVS (https://brandsweets.com/colors/brands/cvs-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Zillow (https://brandsweets.com/colors/brands/zillow-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #503d8a in 11 real palettes, including Wells Fargo's brand system and Walgreens's brand system, as the lead colour. Seen in: Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #503d8a: 13 real palettes, including Unilever's brand system and HP's brand system, as the accent. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), HP (https://brandsweets.com/colors/brands/hp-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 15 real palettes, including First Snow and Microsoft's brand system put Midnight Blue beside #503d8a, as that palette's text colour. Seen in: First Snow (https://brandsweets.com/palettes/cool#first-snow), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono). — https://brandsweets.com/colors/midnightblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #503d8a in 14 real palettes, including Nokia's brand system and Carrefour's brand system, as the supporting colour. Seen in: Nokia (https://brandsweets.com/colors/brands/nokia-com), Carrefour (https://brandsweets.com/colors/brands/carrefour-com), Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com), Motorola (https://brandsweets.com/colors/brands/motorola-com). — https://brandsweets.com/colors/royalblue
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #503d8a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/seagreen

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

- On white (#ffffff): 8.84:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.38:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #7c67bc (4.52:1); AA: background → #bababa (4.55:1); AAA: text → #9d8ecd (7.18:1); AAA: background → #e6e6e6 (7.08:1)

## 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/503d8a-ab9cc4-dfbd4e-291f2d-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: "#503d8a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.