# #557daa

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

## Values

- Hex: `#557daa`
- RGB: rgb(85, 125, 170)
- HSL: hsl(212, 33%, 50%)
- OKLCH: oklch(0.579 0.083 252.1)
- Relative luminance: 0.195
- Nearest named color: steelblue (#4682b4, Δ 2.125) — https://brandsweets.com/colors/steelblue
- Moods: cool, muted
- Page: https://brandsweets.com/colors/557daa

## Tints & shades

- Tints (toward white): #668ab2, #7797bb, #85a1c1, #96aeca, #a7bbd3, #b8c8db, #c9d5e4, #d6e0ea, #e7edf3, #f8fafc
- Shades (toward black): #4d7099, #46668b, #3e5a7a, #37506d, #2e435c, #26374b, #1f2d3d, #16202c, #0f161f, #070a0e

## Harmonies

- Complementary: #aa8255
- Analogous: #55a7aa, #5855aa
- Triadic: #aa557d, #7daa55
- Split-complementary: #aa5855, #a7aa55
- Tetradic: #aa55a7, #aa8255, #55aa58

## Colors that go with #557daa

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 #557daa: softer than #000 and cool enough to feel like part of the same palette. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Auth0 (https://brandsweets.com/colors/brands/auth0-com), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/charcoal
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #557daa on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Notion (https://brandsweets.com/colors/brands/notion), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Dusk (https://brandsweets.com/palettes/cool#dusk), Atelier (https://brandsweets.com/palettes/elegant#atelier). — https://brandsweets.com/colors/copper
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #557daa — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Intel (https://brandsweets.com/colors/brands/intel-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com). — https://brandsweets.com/colors/seagreen
- **Amber** #ffbf00 [pool] — Amber is paired with #557daa in 9 real palettes, including Beach Hut and Wired's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Wired (https://brandsweets.com/colors/brands/wired-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 4 real palettes, including Qualcomm's brand system and Activision's brand system put Blue beside #557daa, as the accent. Seen in: Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Activision (https://brandsweets.com/colors/brands/activision-com), Pixar (https://brandsweets.com/colors/brands/pixar-com), Readymag (https://brandsweets.com/colors/brands/readymag-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #557daa: 8 real palettes, including Fintech Trust and Hershey's's brand system, as the lead colour. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Glacier (https://brandsweets.com/palettes/cool#glacier), General Mills (https://brandsweets.com/colors/brands/generalmills-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #557daa in 15 real palettes, including Retro Pop and Wendy's's brand system, as the lead colour. Seen in: Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Wendy's (https://brandsweets.com/colors/brands/wendys-com), NASCAR (https://brandsweets.com/colors/brands/nascar-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #557daa: 5 real palettes, including Astro's brand system and Deep Water, as the supporting colour. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Telegram (https://brandsweets.com/colors/brands/telegram-org), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 4.29:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #5278a3 (4.59:1); AA: background → #0d0d0d (4.54:1); AAA: text → #3e5a7a (7.12:1)
- On black (#000000): 4.9:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #7b99bc (7.12:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/557daa-9caac4-df564e-1f202d-e9f1f1?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: "#557daa" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.