# #3d686c

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

## Values

- Hex: `#3d686c`
- RGB: rgb(61, 104, 108)
- HSL: hsl(185, 28%, 33%)
- OKLCH: oklch(0.488 0.048 203.3)
- Relative luminance: 0.1198
- Nearest named color: Deep Pool Teal (#366d68, Δ 1.979) — https://brandsweets.com/colors/deep-pool-teal
- Moods: cool, muted
- Page: https://brandsweets.com/colors/3d686c

## Tints & shades

- Tints (toward white): #497e83, #549196, #66a3a9, #79afb4, #90bdc1, #a4c8cc, #bad6d8, #cee2e3, #e5eff0, #f8fbfb
- Shades (toward black): #375e62, #325558, #2c4b4e, #274245, #233c3e, #1d3234, #18292a, #121f21, #0d1617, #070d0d

## Harmonies

- Complementary: #6c413d
- Analogous: #3d6c58, #3d506c
- Triadic: #6c3d68, #686c3d
- Split-complementary: #6c3d50, #6c583d
- Tetradic: #583d6c, #6c413d, #506c3d

## Colors that go with #3d686c

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 #3d686c: softer than #000 and cool enough to feel like part of the same palette. Seen in: Pampers (https://brandsweets.com/colors/brands/pampers-com), Gusto (https://brandsweets.com/colors/brands/gusto-com), Stanley (https://brandsweets.com/colors/brands/stanley1913-com), Canopy (https://brandsweets.com/palettes/cool#canopy). — https://brandsweets.com/colors/charcoal
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #3d686c on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove). — https://brandsweets.com/colors/sienna
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #3d686c: 4 real palettes, including Alpine and Open House, as the supporting colour. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), Open House (https://brandsweets.com/palettes/clean#open-house), Dusk (https://brandsweets.com/palettes/cool#dusk), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine). — https://brandsweets.com/colors/cadetblue
- **Champagne** #f7e7ce [pool] — 4 real palettes, including Darkroom and BrandSweets's brand system put Champagne beside #3d686c, as the surface under it. Seen in: Darkroom (https://brandsweets.com/palettes/muted#darkroom), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar). — https://brandsweets.com/colors/champagne
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #3d686c: 4 real palettes, including Ink & Paper and Fintech Trust, as the accent. Seen in: Ink & Paper (https://brandsweets.com/palettes/minimal#ink-and-paper), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Intel (https://brandsweets.com/colors/brands/intel-com), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/cobalt
- **Copper** #b87333 [pool] — Designers have shipped Copper with #3d686c: 5 real palettes, including Desert Road and Clay & Linen, as the lead colour. Seen in: Desert Road (https://brandsweets.com/palettes/warm#desert-road), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen), Dusk (https://brandsweets.com/palettes/cool#dusk), Riverbed (https://brandsweets.com/palettes/muted#riverbed). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #3d686c in 10 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
- **Dark Goldenrod** #b8860b [pool] — 4 real palettes, including Cider and Rolex's brand system put Dark Goldenrod beside #3d686c, as the supporting colour. Seen in: Cider (https://brandsweets.com/palettes/warm#cider), Rolex (https://brandsweets.com/colors/brands/rolex-com), Greige (https://brandsweets.com/palettes/neutral#greige), Puma (https://brandsweets.com/colors/brands/puma-com). — https://brandsweets.com/colors/darkgoldenrod

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

- On white (#ffffff): 6.19:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #375e62 (7.14:1)
- On black (#000000): 3.4:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #497e83 (4.6:1); AA: background → #dedede (4.6:1); AAA: text → #62a1a7 (7.18:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/3d686c-a2b8be-df4e88-1f262d-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: "#3d686c" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.