# #558c9b

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

## Values

- Hex: `#558c9b`
- RGB: rgb(85, 140, 155)
- HSL: hsl(193, 29%, 47%)
- OKLCH: oklch(0.608 0.062 217.1)
- Relative luminance: 0.2305
- Nearest named color: Blue Moon (#3992a8, Δ 2.826) — https://brandsweets.com/colors/blue-moon
- Moods: cool, muted
- Page: https://brandsweets.com/colors/558c9b

## Tints & shades

- Tints (toward white): #6199a8, #72a3b1, #82aeba, #92b9c3, #a6c5ce, #b7d0d7, #c7dbe0, #d8e5e9, #e8f0f2, #f8fbfb
- Shades (toward black): #4e808d, #45717d, #3e6570, #365963, #2f4d56, #263e45, #1f3238, #18272b, #0e181a, #070c0d

## Harmonies

- Complementary: #9b6455
- Analogous: #559b87, #55699b
- Triadic: #9b558c, #8c9b55
- Split-complementary: #9b5569, #9b8755
- Tetradic: #87559b, #9b6455, #699b55

## Colors that go with #558c9b

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 #558c9b: softer than #000 and cool enough to feel like part of the same palette. Seen in: Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Hermès (https://brandsweets.com/colors/brands/hermes-com), PlayStation® Official Site: Consoles, Games, Accessories & MoreSony Interactive Entertainment (https://brandsweets.com/colors/brands/playstation-com), Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue). — https://brandsweets.com/colors/charcoal
- **Copper** #b87333 [harmony, pool: split] — Copper is a split-complement of #558c9b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Atelier (https://brandsweets.com/palettes/elegant#atelier), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Wellness (https://brandsweets.com/palettes/warm#wellness). — https://brandsweets.com/colors/copper
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #558c9b: 6 real palettes, including Ink & Paper and Hershey's's brand system, as the accent. Seen in: Ink & Paper (https://brandsweets.com/palettes/minimal#ink-and-paper), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Glacier (https://brandsweets.com/palettes/cool#glacier), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #558c9b in 8 real palettes, including Retro Pop and Diner, as the lead colour. Seen in: Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Diner (https://brandsweets.com/palettes/vivid#diner), Redfin (https://brandsweets.com/colors/brands/redfin-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #558c9b: 15 real palettes, including Peacock and Campus, as the supporting colour. Seen in: Peacock (https://brandsweets.com/palettes/vivid#peacock), Campus (https://brandsweets.com/palettes/friendly#campus), Dusk (https://brandsweets.com/palettes/cool#dusk), Discover (https://brandsweets.com/colors/brands/discover-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #558c9b: 4 real palettes, including Honda's brand system and Wendy's's brand system, as the supporting colour. Seen in: Honda (https://brandsweets.com/colors/brands/honda-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com), Newsprint (https://brandsweets.com/palettes/editorial#newsprint), AT&T (https://brandsweets.com/colors/brands/att-com). — https://brandsweets.com/colors/firebrick
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #558c9b in 5 real palettes, including Ledger Dark and Noir Beauty, as the lead colour. Seen in: Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark), Noir Beauty (https://brandsweets.com/palettes/dark#noir-beauty), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/goldenrod
- **Midnight Blue** #191970 [pool] — 10 real palettes, including Plaid's brand system and Tide Pool put Midnight Blue beside #558c9b, as the supporting colour. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Ford (https://brandsweets.com/colors/brands/ford-com), SoFi (https://brandsweets.com/colors/brands/sofi-com). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 3.74:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #4c7d8a (4.56:1); AA: background → #1c1c1c (4.55:1); AAA: text → #385c66 (7.26:1)
- On black (#000000): 5.61:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #689dac (7.01:1)

## Curated palettes containing it

- **Still Water** (calm, cool, muted, light) — #5b8a9a, #a9c4cc, #e3d5b8, #f5f8f9, #1e2f36 — Dusty teal and mist with a sand accent — low chroma, low contrast between colours, high contrast for text: the recipe for calm. — tool: https://brandsweets.com/palettes/new/5b8a9a-a9c4cc-e3d5b8-f5f8f9-1e2f36 — collection: https://brandsweets.com/palettes/calm

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/558c9b-a2b5be-df4e75-1f242d-e9f1ef?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: "#558c9b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.