# #378b4d

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

## Values

- Hex: `#378b4d`
- RGB: rgb(55, 139, 77)
- HSL: hsl(136, 43%, 38%)
- OKLCH: oklch(0.569 0.125 149.4)
- Relative luminance: 0.1981
- Nearest named color: seagreen (#2e8b57, Δ 1.319) — https://brandsweets.com/colors/seagreen
- Moods: neutral
- Page: https://brandsweets.com/colors/378b4d

## Tints & shades

- Tints (toward white): #40a05a, #49b666, #5fbf78, #74c88b, #8ad09d, #a0d9af, #b6e2c2, #ccebd4, #e2f3e7, #f8fcf9
- Shades (toward black): #338047, #2d713f, #296639, #235831, #1f4d2b, #1a4225, #14331d, #102816, #0a1a0e, #060f08

## Harmonies

- Complementary: #8b3774
- Analogous: #4b8b37, #378b77
- Triadic: #4d378b, #8b4d37
- Split-complementary: #77378b, #8b374b
- Tetradic: #374b8b, #8b3774, #8b7737

## Colors that go with #378b4d

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 body-text near-black for #378b4d: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), N26 (https://brandsweets.com/colors/brands/n26-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #378b4d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Subaru (https://brandsweets.com/colors/brands/subaru-com), Xbox (https://brandsweets.com/colors/brands/xbox-com), Console Light (https://brandsweets.com/palettes/technical#console-light). — https://brandsweets.com/colors/royalblue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #378b4d: 4 real palettes, including Wellness and Riverbed, as the supporting colour. Seen in: Wellness (https://brandsweets.com/palettes/warm#wellness), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #378b4d in 7 real palettes, including Coinbase's brand system and Five Guys's brand system. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix), Diner (https://brandsweets.com/palettes/vivid#diner). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #378b4d: 6 real palettes, including Intel's brand system and Jack Daniel's's brand system, as the supporting colour. Seen in: 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), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 4 real palettes, including Paramount+'s brand system and Telehealth put Midnight Blue beside #378b4d, as the supporting colour. Seen in: Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/midnightblue
- **Taupe** #483c32 [pool] — Taupe is paired with #378b4d in 14 real palettes, including Subaru's brand system and Acer's brand system, as that palette's text colour. Seen in: Subaru (https://brandsweets.com/colors/brands/subaru-com), Acer (https://brandsweets.com/colors/brands/acer-com), Wellness (https://brandsweets.com/palettes/warm#wellness), Instacart (https://brandsweets.com/colors/brands/instacart-com). — https://brandsweets.com/colors/taupe
- **Medium Orchid** #ba55d3 [harmony: complementary] — Medium Orchid sits directly opposite #378b4d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/mediumorchid

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

- On white (#ffffff): 4.23:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #348349 (4.68:1); AA: background → #0f0f0f (4.53:1); AAA: text → #276237 (7.27:1)
- On black (#000000): 4.96:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #43a85e (7:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/378b4d-a2bead-b959d4-1f2d29-ebf1e9?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: "#378b4d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.