# #509d9f

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

## Values

- Hex: `#509d9f`
- RGB: rgb(80, 157, 159)
- HSL: hsl(182, 33%, 47%)
- OKLCH: oklch(0.648 0.076 197.7)
- Relative luminance: 0.2832
- Nearest named color: cadetblue (#5f9ea0, Δ 1.48) — https://brandsweets.com/colors/cadetblue
- Moods: cool, muted
- Page: https://brandsweets.com/colors/509d9f

## Tints & shades

- Tints (toward white): #5caaad, #6db3b6, #7ebcbe, #8fc5c7, #a3cfd1, #b4d8d9, #c5e1e2, #d6eaea, #e7f3f3, #f8fbfc
- Shades (toward black): #498f92, #417f81, #3a7173, #336466, #2c5758, #244647, #1d393a, #162b2c, #0e1b1b, #070d0e

## Harmonies

- Complementary: #9f5350
- Analogous: #509f7a, #50759f
- Triadic: #9f509d, #9d9f50
- Split-complementary: #9f5075, #9f7a50
- Tetradic: #7a509f, #9f5350, #759f50

## Colors that go with #509d9f

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 #509d9f: 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), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/charcoal
- **Blush Pink** #e8b4b8 [pool] — 4 real palettes, including Rain Garden and Estate put Blush Pink beside #509d9f, 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 #509d9f: 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 #509d9f 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 #509d9f: 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 #509d9f, 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 #509d9f, 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 #509d9f 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 → #417f81 (4.59:1); AA: background → #292929 (4.62:1); AAA: text → #305d5f (7.35:1)
- On black (#000000): 6.66:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #54a3a6 (7.17:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/509d9f-a2babe-d45990-1f272d-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: "#509d9f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.