# #603b63

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

## Values

- Hex: `#603b63`
- RGB: rgb(96, 59, 99)
- HSL: hsl(296, 25%, 31%)
- OKLCH: oklch(0.412 0.079 324.2)
- Relative luminance: 0.0652
- Nearest named color: Long Passionate Night (#5b365e, Δ 1.809) — https://brandsweets.com/colors/long-passionate-night
- Moods: cool, muted
- Page: https://brandsweets.com/colors/603b63

## Tints & shades

- Tints (toward white): #764979, #89548c, #9d63a1, #ab79af, #b98fbc, #c5a3c8, #d3b9d5, #e1cfe2, #ede2ee, #fbf9fb
- Shades (toward black): #573659, #513253, #472c49, #3e2640, #382239, #2f1d30, #251726, #1c111d, #160d16, #0c080d

## Harmonies

- Complementary: #3e633b
- Analogous: #4c3b63, #633b52
- Triadic: #63603b, #3b6360
- Split-complementary: #52633b, #3b634c
- Tetradic: #634c3b, #3e633b, #3b5263

## Colors that go with #603b63

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 #603b63 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 #603b63 in 6 real palettes, including Lenovo's brand system and Wells Fargo's brand system, as the supporting colour. Seen in: Lenovo (https://brandsweets.com/colors/brands/lenovo-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #603b63: 4 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 Microsoft's brand system and First Snow put Midnight Blue beside #603b63, as the accent. Seen in: Microsoft (https://brandsweets.com/colors/brands/microsoft-com), First Snow (https://brandsweets.com/palettes/cool#first-snow), Lufthansa (https://brandsweets.com/colors/brands/lufthansa-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/midnightblue
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #603b63: 5 real palettes, including Nursery and Macaron, as the supporting colour. Seen in: Nursery (https://brandsweets.com/palettes/light#nursery), Macaron (https://brandsweets.com/palettes/light#macaron), Stone (https://brandsweets.com/palettes/neutral#stone), First Snow (https://brandsweets.com/palettes/cool#first-snow). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #603b63 in 6 real palettes, including Console Light and Zoom's brand system, as the lead colour. Seen in: Console Light (https://brandsweets.com/palettes/technical#console-light), Zoom (https://brandsweets.com/colors/brands/zoom-us), GitHub (https://brandsweets.com/colors/brands/github), Stripe (https://brandsweets.com/colors/brands/stripe). — https://brandsweets.com/colors/royalblue
- **Teal** #008080 [harmony, pool: split] — Teal is a split-complement of #603b63: 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). — https://brandsweets.com/colors/teal
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #603b63: 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): 9.12:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.3:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9b609f (4.57:1); AA: background → #b8b8b8 (4.6:1); AAA: text → #b386b6 (7:1); AAA: background → #e3e3e3 (7.1:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/603b63-c19fbf-9ccb62-2d1f28-ede9f1?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: "#603b63" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.