# #3f7678

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

## Values

- Hex: `#3f7678`
- RGB: rgb(63, 118, 120)
- HSL: hsl(182, 31%, 36%)
- OKLCH: oklch(0.529 0.058 198.6)
- Relative luminance: 0.1537
- Nearest named color: Green Sleeves (#39766c, Δ 2.088) — https://brandsweets.com/colors/green-sleeves
- Moods: cool, muted
- Page: https://brandsweets.com/colors/3f7678

## Tints & shades

- Tints (toward white): #4a8a8c, #549ea0, #69adb0, #7db8ba, #91c3c5, #a5cecf, #b9d9da, #d0e6e6, #e4f1f1, #f8fbfb
- Shades (toward black): #3a6c6e, #356364, #2e5557, #284c4d, #234243, #1e3839, #192e2f, #122121, #0c1717, #070d0d

## Harmonies

- Complementary: #78413f
- Analogous: #3f785e, #3f5a78
- Triadic: #783f76, #76783f
- Split-complementary: #783f5a, #785e3f
- Tetradic: #5e3f78, #78413f, #5a783f

## Colors that go with #3f7678

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 #3f7678: softer than #000 and cool enough to feel like part of the same palette. Seen in: Gusto (https://brandsweets.com/colors/brands/gusto-com), N26 (https://brandsweets.com/colors/brands/n26-com), Stanley (https://brandsweets.com/colors/brands/stanley1913-com), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/charcoal
- **Rust** #b7410e [harmony, pool: complementary] — Rust sits directly opposite #3f7678 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre), Gallery (https://brandsweets.com/palettes/editorial#gallery), Noir Beauty (https://brandsweets.com/palettes/dark#noir-beauty). — https://brandsweets.com/colors/rust
- **Amber** #ffbf00 [pool] — Amber is paired with #3f7678 in 4 real palettes, including Beach Hut and Lemon Squeezy's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Wired (https://brandsweets.com/colors/brands/wired-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Champagne** #f7e7ce [pool] — 5 real palettes, including Forest Floor and Darkroom put Champagne beside #3f7678, as that palette's text colour. Seen in: Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), Darkroom (https://brandsweets.com/palettes/muted#darkroom), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar). — https://brandsweets.com/colors/champagne
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #3f7678: 6 real palettes, including Ink & Paper and Intel's brand system, as the accent. Seen in: Ink & Paper (https://brandsweets.com/palettes/minimal#ink-and-paper), Intel (https://brandsweets.com/colors/brands/intel-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/cobalt
- **Copper** #b87333 [pool] — Designers have shipped Copper with #3f7678: 7 real palettes, including Riverbed and Clay & Linen, as the accent. Seen in: Riverbed (https://brandsweets.com/palettes/muted#riverbed), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen), Desert Road (https://brandsweets.com/palettes/warm#desert-road), Wellness (https://brandsweets.com/palettes/warm#wellness). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #3f7678 in 11 real palettes, including Gemstone and Redfin's brand system, as the accent. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Redfin (https://brandsweets.com/colors/brands/redfin-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #3f7678: 13 real palettes, including Campus and The New York Times's brand system, as the lead colour. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), The New York Times (https://brandsweets.com/colors/brands/nytimes-com), Intel (https://brandsweets.com/colors/brands/intel-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 5.15:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #335f61 (7.12:1)
- On black (#000000): 4.07:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #458082 (4.66:1); AA: background → #f0f0f0 (4.52:1); AAA: text → #56a1a4 (7.03:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/3f7678-a2babe-d45990-1f272d-e9f1ee?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: "#3f7678" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.