# #577d7f

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

## Values

- Hex: `#577d7f`
- RGB: rgb(87, 125, 127)
- HSL: hsl(183, 19%, 42%)
- OKLCH: oklch(0.562 0.043 200.1)
- Relative luminance: 0.1823
- Nearest named color: Blue Blood (#6b7f81, Δ 2.702) — https://brandsweets.com/colors/blue-blood
- Moods: cool, muted
- Page: https://brandsweets.com/colors/577d7f

## Tints & shades

- Tints (toward white): #638f92, #709c9e, #83a8aa, #92b3b5, #a4c0c1, #b6cccd, #c5d7d8, #d8e4e4, #e7eeee, #f9fbfb
- Shades (toward black): #4e7173, #466667, #405d5e, #385152, #304546, #27393a, #1f2d2e, #192424, #111818, #080c0c

## Harmonies

- Complementary: #7f5957
- Analogous: #577f6d, #57697f
- Triadic: #7f577d, #7d7f57
- Split-complementary: #7f5769, #7f6d57
- Tetradic: #6d577f, #7f5957, #697f57

## Colors that go with #577d7f

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 #577d7f: softer than #000 and cool enough to feel like part of the same palette. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), N26 (https://brandsweets.com/colors/brands/n26-com), Gusto (https://brandsweets.com/colors/brands/gusto-com), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com). — https://brandsweets.com/colors/charcoal
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #577d7f 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
- **Amber** #ffbf00 [pool] — Amber is paired with #577d7f 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] — 7 real palettes, including Forest Floor and Coffee Bar put Champagne beside #577d7f, as that palette's text colour. Seen in: Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Midnight Luxe (https://brandsweets.com/palettes/luxury#midnight-luxe). — https://brandsweets.com/colors/champagne
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #577d7f: 5 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 #577d7f: 7 real palettes, including Riverbed and Wellness, as the accent. Seen in: Riverbed (https://brandsweets.com/palettes/muted#riverbed), Wellness (https://brandsweets.com/palettes/warm#wellness), Atelier (https://brandsweets.com/palettes/elegant#atelier), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #577d7f in 10 real palettes, including Retro Pop and Redfin's brand system, as the lead colour. Seen in: Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Redfin (https://brandsweets.com/colors/brands/redfin-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #577d7f: 4 real palettes, including Deep Water and Warp's brand system, as the lead colour. Seen in: Deep Water (https://brandsweets.com/palettes/dark#deep-water), Warp (https://brandsweets.com/colors/brands/warp-dev), Telegram (https://brandsweets.com/colors/brands/telegram-org), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 4.52:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #405d5e (7.13:1)
- On black (#000000): 4.65:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #739ea0 (7.13:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/577d7f-a2b9be-d4598e-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: "#577d7f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.