# #603d71

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

## Values

- Hex: `#603d71`
- RGB: rgb(96, 61, 113)
- HSL: hsl(280, 30%, 34%)
- OKLCH: oklch(0.423 0.093 313.9)
- Relative luminance: 0.0702
- Nearest named color: Heartless (#623b70, Δ 0.597) — https://brandsweets.com/colors/heartless
- Moods: cool, muted
- Page: https://brandsweets.com/colors/603d71

## Tints & shades

- Tints (toward white): #704785, #84549c, #9363ab, #a37ab8, #b18ec2, #bfa2cd, #cfb9da, #ddcde4, #ede4f1, #faf8fb
- Shades (toward black): #573767, #4f325d, #462d53, #3e2749, #35223f, #2d1d35, #24172b, #1c1221, #140c17, #0b070d

## Harmonies

- Complementary: #4e713d
- Analogous: #453d71, #713d68
- Triadic: #715f3d, #3d715f
- Split-complementary: #68713d, #3d7145
- Tetradic: #71453d, #4e713d, #3d6871

## Colors that go with #603d71

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 #603d71 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Subaru (https://brandsweets.com/colors/brands/subaru-com). — https://brandsweets.com/colors/seagreen
- **Crimson** #dc143c [pool] — Crimson is paired with #603d71 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), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #603d71: 5 real palettes, including Hinge's brand system and HP's brand system, as the accent. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), HP (https://brandsweets.com/colors/brands/hp-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 4 real palettes, including First Snow and Microsoft's brand system put Midnight Blue beside #603d71, 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), Lufthansa (https://brandsweets.com/colors/brands/lufthansa-com), FIFA (https://brandsweets.com/colors/brands/fifa-com). — https://brandsweets.com/colors/midnightblue
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #603d71: 4 real palettes, including First Snow and Nursery, as the accent. Seen in: First Snow (https://brandsweets.com/palettes/cool#first-snow), Nursery (https://brandsweets.com/palettes/light#nursery), Macaron (https://brandsweets.com/palettes/light#macaron), Stone (https://brandsweets.com/palettes/neutral#stone). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #603d71 in 7 real palettes, including Console Light and Stripe's brand system, as the lead colour. Seen in: Console Light (https://brandsweets.com/palettes/technical#console-light), Stripe (https://brandsweets.com/colors/brands/stripe), Zoom (https://brandsweets.com/colors/brands/zoom-us), GitHub (https://brandsweets.com/colors/brands/github). — https://brandsweets.com/colors/royalblue
- **Teal** #008080 [harmony, pool: split] — Teal is a split-complement of #603d71: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Stanley (https://brandsweets.com/colors/brands/stanley1913-com), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold). — https://brandsweets.com/colors/teal
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #603d71: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 8.74:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.4:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9363ab (4.61:1); AA: background → #bababa (4.5:1); AAA: text → #ac88bf (7.03:1); AAA: background → #e6e6e6 (7:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/603d71-b99fc1-b8cb62-2d1f2c-ebe9f1?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: "#603d71" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.