# #519d9e

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

## Values

- Hex: `#519d9e`
- RGB: rgb(81, 157, 158)
- HSL: hsl(181, 32%, 47%)
- OKLCH: oklch(0.648 0.075 196.6)
- Relative luminance: 0.2833
- Nearest named color: cadetblue (#5f9ea0, Δ 1.433) — https://brandsweets.com/colors/cadetblue
- Moods: cool, muted
- Page: https://brandsweets.com/colors/519d9e

## Tints & shades

- Tints (toward white): #5daaac, #6eb3b4, #7fbcbd, #90c5c6, #a4cfd0, #b5d8d9, #c6e1e2, #d7eaea, #e7f3f3, #f8fbfc
- Shades (toward black): #4b9091, #427f80, #3b7272, #346465, #2d5758, #244647, #1d3939, #172b2c, #0e1b1b, #070d0d

## Harmonies

- Complementary: #9e5351
- Analogous: #519e79, #51779e
- Triadic: #9e519d, #9d9e51
- Split-complementary: #9e5177, #9e7951
- Tetradic: #79519e, #9e5351, #779e51

## Colors that go with #519d9e

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 #519d9e: softer than #000 and cool enough to feel like part of the same palette. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), N26 (https://brandsweets.com/colors/brands/n26-com), Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue). — https://brandsweets.com/colors/charcoal
- **Blush Pink** #e8b4b8 [pool] — 4 real palettes, including Rain Garden and Estate put Blush Pink beside #519d9e, as the accent. Seen in: Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Estate (https://brandsweets.com/palettes/luxury#estate), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono). — https://brandsweets.com/colors/blush-pink
- **Copper** #b87333 [pool] — Designers have shipped Copper with #519d9e: 6 real palettes, including Clean Beauty and Dusk, as the accent. Seen in: Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Dusk (https://brandsweets.com/palettes/cool#dusk), Atelier (https://brandsweets.com/palettes/elegant#atelier), Wellness (https://brandsweets.com/palettes/warm#wellness). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #519d9e in 6 real palettes, including Diner and Redfin's brand system, as the lead colour. Seen in: Diner (https://brandsweets.com/palettes/vivid#diner), Redfin (https://brandsweets.com/colors/brands/redfin-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), DuckDuckGo (https://brandsweets.com/colors/brands/duckduckgo-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #519d9e: 10 real palettes, including Peacock and Dusk, as the supporting colour. Seen in: Peacock (https://brandsweets.com/palettes/vivid#peacock), Dusk (https://brandsweets.com/palettes/cool#dusk), Open House (https://brandsweets.com/palettes/clean#open-house), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 9 real palettes, including Ford's brand system and Tide Pool put Midnight Blue beside #519d9e, as the lead colour. Seen in: Ford (https://brandsweets.com/colors/brands/ford-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), SoFi (https://brandsweets.com/colors/brands/sofi-com), Confluent (https://brandsweets.com/colors/brands/confluent-io). — https://brandsweets.com/colors/midnightblue
- **Orange** #ffa500 [pool] — 4 real palettes, including Gopro's brand system and Graphite put Orange beside #519d9e, as the accent. Seen in: Gopro (https://brandsweets.com/colors/brands/gopro-com), Graphite (https://brandsweets.com/palettes/technical#graphite), Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/orange
- **Indian Red** #cd5c5c [harmony: complementary] — Indian Red sits directly opposite #519d9e on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/indianred

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

- On white (#ffffff): 3.15:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #427f80 (4.59:1); AA: background → #292929 (4.62:1); AAA: text → #315d5e (7.35:1)
- On black (#000000): 6.67:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #55a4a5 (7.24:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/519d9e-a2babe-d45992-1f272d-e9f1ed?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: "#519d9e" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.