# #604b91

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

## Values

- Hex: `#604b91`
- RGB: rgb(96, 75, 145)
- HSL: hsl(258, 32%, 43%)
- OKLCH: oklch(0.468 0.111 295.6)
- Relative luminance: 0.0956
- Nearest named color: Lords of the Night (#664488, Δ 2.266) — https://brandsweets.com/colors/lords-of-the-night
- Moods: cool, muted
- Page: https://brandsweets.com/colors/604b91

## Tints & shades

- Tints (toward white): #6d55a5, #7b64af, #8c78ba, #9a89c2, #ac9dcd, #baaed5, #cbc2e0, #dad3e8, #ebe7f3, #f9f8fc
- Shades (toward black): #574483, #4e3d76, #453668, #3c2f5b, #352a51, #2c2343, #241c36, #1b1528, #120e1b, #09070d

## Harmonies

- Complementary: #7c914b
- Analogous: #4b5991, #834b91
- Triadic: #91604b, #4b9160
- Split-complementary: #91834b, #59914b
- Tetradic: #914b59, #7c914b, #4b9183

## Colors that go with #604b91

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 #604b91: softer than #000 and cool enough to feel like part of the same palette. Seen in: Harbour (https://brandsweets.com/palettes/cool#harbour), Amazon (https://brandsweets.com/colors/brands/amazon-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #604b91: 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), Subaru (https://brandsweets.com/colors/brands/subaru-com). — https://brandsweets.com/colors/seagreen
- **Blue** #0000ff [pool] — 4 real palettes, including Pixar's brand system and Tesco's brand system put Blue beside #604b91, as the accent. Seen in: Pixar (https://brandsweets.com/colors/brands/pixar-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Activision (https://brandsweets.com/colors/brands/activision-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #604b91 in 9 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), Netflix (https://brandsweets.com/colors/brands/netflix), Ulta Beauty (https://brandsweets.com/colors/brands/ulta-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #604b91: 12 real palettes, including HP's brand system and The New York Times's brand system, as the accent. Seen in: HP (https://brandsweets.com/colors/brands/hp-com), The New York Times (https://brandsweets.com/colors/brands/nytimes-com), Dutch Bros (https://brandsweets.com/colors/brands/dutchbros-com), General Mills (https://brandsweets.com/colors/brands/generalmills-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 16 real palettes, including FIFA's brand system and Lufthansa's brand system put Midnight Blue beside #604b91, as the lead colour. Seen in: FIFA (https://brandsweets.com/colors/brands/fifa-com), Lufthansa (https://brandsweets.com/colors/brands/lufthansa-com), First Snow (https://brandsweets.com/palettes/cool#first-snow), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/midnightblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #604b91 in 12 real palettes, including Stripe's brand system and Fivetran blue's brand system, as the accent. Seen in: Stripe (https://brandsweets.com/colors/brands/stripe), Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com), Guinness (https://brandsweets.com/colors/brands/guinness-com), Motorola (https://brandsweets.com/colors/brands/motorola-com). — https://brandsweets.com/colors/royalblue
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #604b91's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Capital One (https://brandsweets.com/colors/brands/capitalone-com), American Express (https://brandsweets.com/colors/brands/americanexpress-com), Discover (https://brandsweets.com/colors/brands/discover-com). — https://brandsweets.com/colors/steelblue

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

- On white (#ffffff): 7.21:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.91:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #7e68b1 (4.5:1); AA: background → #cfcfcf (4.63:1); AAA: text → #9d8dc4 (7.04:1); AAA: background → #fcfcfc (7.03:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/604b91-ad9cc4-dfc44e-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: "#604b91" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.