# #399d66

A color — neutral. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#399d66`
- RGB: rgb(57, 157, 102)
- HSL: hsl(147, 47%, 42%)
- OKLCH: oklch(0.623 0.125 155.7)
- Relative luminance: 0.2594
- Nearest named color: Bulma Hair (#359e6b, Δ 0.628) — https://brandsweets.com/colors/bulma-hair
- Moods: neutral
- Page: https://brandsweets.com/colors/399d66

## Tints & shades

- Tints (toward white): #41b475, #4fbf82, #65c892, #78ce9f, #8fd6af, #a5dfbf, #b8e5cc, #ceeddc, #e1f4ea, #f8fcfa
- Shades (toward black): #338e5c, #2e7f53, #2a744b, #246542, #1f5638, #1a472e, #143824, #102d1d, #0b1e13, #050f0a

## Harmonies

- Complementary: #9d3970
- Analogous: #3e9d39, #399d98
- Triadic: #66399d, #9d6639
- Split-complementary: #98399d, #9d393e
- Tetradic: #393e9d, #9d3970, #9d9839

## Colors that go with #399d66

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 #399d66: softer than #000 and cool enough to feel like part of the same palette. Seen in: Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Coastal (https://brandsweets.com/palettes/cool#coastal), N26 (https://brandsweets.com/colors/brands/n26-com), Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/charcoal
- **Blue** #0000ff [pool] — 4 real palettes, including Kia's brand system and Unity's brand system put Blue beside #399d66, as the accent. Seen in: Kia (https://brandsweets.com/colors/brands/kia-com), Unity (https://brandsweets.com/colors/brands/unity-com), Spotify (https://brandsweets.com/colors/brands/spotify), Instacart (https://brandsweets.com/colors/brands/instacart-com). — https://brandsweets.com/colors/blue
- **Chocolate** #d2691e [harmony, pool: triadic] — Chocolate completes a triad with #399d66 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Wellness (https://brandsweets.com/palettes/warm#wellness), Farmers Market (https://brandsweets.com/palettes/warm#farmers-market), Homestead (https://brandsweets.com/palettes/warm#homestead). — https://brandsweets.com/colors/chocolate
- **Crimson** #dc143c [pool] — Crimson is paired with #399d66 in 6 real palettes, including Diner and DuckDuckGo's brand system, as the lead colour. Seen in: Diner (https://brandsweets.com/palettes/vivid#diner), DuckDuckGo (https://brandsweets.com/colors/brands/duckduckgo-com), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #399d66: 5 real palettes, including Peacock and Intel's brand system, as the supporting colour. Seen in: Peacock (https://brandsweets.com/palettes/vivid#peacock), Intel (https://brandsweets.com/colors/brands/intel-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 5 real palettes, including Fintech Trust and Telehealth put Midnight Blue beside #399d66, as the text colour against it. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/midnightblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #399d66 in 6 real palettes, including Console Light and Telehealth, as the lead colour. Seen in: Console Light (https://brandsweets.com/palettes/technical#console-light), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Subaru (https://brandsweets.com/colors/brands/subaru-com), Coinbase (https://brandsweets.com/colors/brands/coinbase). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #399d66 in 14 real palettes, including Wellness and Subaru's brand system, as that palette's text colour. Seen in: Wellness (https://brandsweets.com/palettes/warm#wellness), Subaru (https://brandsweets.com/colors/brands/subaru-com), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Mushroom (https://brandsweets.com/palettes/neutral#mushroom). — https://brandsweets.com/colors/taupe

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

- On white (#ffffff): 3.39:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #2f8355 (4.67:1); AA: background → #242424 (4.57:1); AAA: text → #23613f (7.36:1)
- On black (#000000): 6.19:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #3da96d (7.09:1)

## Brands using this color

- **Next.js** — secondary #449d5d (Δ 1.26) — https://brandsweets.com/colors/brands/nextjs-org

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/399d66-a2beb2-d059d4-1f2d2c-eaf1e9?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: "#399d66" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.