# #6599a4

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

## Values

- Hex: `#6599a4`
- RGB: rgb(101, 153, 164)
- HSL: hsl(190, 26%, 52%)
- OKLCH: oklch(0.65 0.058 212.4)
- Relative luminance: 0.2823
- Nearest named color: cadetblue (#5f9ea0, Δ 1.827) — https://brandsweets.com/colors/cadetblue
- Moods: cool, muted
- Page: https://brandsweets.com/colors/6599a4

## Tints & shades

- Tints (toward white): #75a4ae, #82adb5, #92b7bf, #9fc0c6, #afcad0, #bfd5d9, #ccdde1, #dce8ea, #e9f0f2, #f9fbfb
- Shades (toward black): #598d97, #4f7e87, #48727a, #3e636a, #35545a, #2b454a, #22363a, #1a2a2d, #111b1d, #080c0d

## Harmonies

- Complementary: #a46f65
- Analogous: #65a48f, #657aa4
- Triadic: #a4659a, #9aa465
- Split-complementary: #a4657a, #a48f65
- Tetradic: #8f65a4, #a46f65, #7aa465

## Colors that go with #6599a4

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 #6599a4: softer than #000 and cool enough to feel like part of the same palette. Seen in: Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue), 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). — https://brandsweets.com/colors/charcoal
- **Copper** #b87333 [harmony, pool: split] — Copper is a split-complement of #6599a4: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Atelier (https://brandsweets.com/palettes/elegant#atelier), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Riverbed (https://brandsweets.com/palettes/muted#riverbed). — https://brandsweets.com/colors/copper
- **Terracotta** #e2725b [harmony, pool: complementary] — Terracotta sits directly opposite #6599a4 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), Resort (https://brandsweets.com/palettes/light#resort). — https://brandsweets.com/colors/terracotta
- **Blush Pink** #e8b4b8 [pool] — 4 real palettes, including Estate and Rain Garden put Blush Pink beside #6599a4, as the accent. Seen in: Estate (https://brandsweets.com/palettes/luxury#estate), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding). — https://brandsweets.com/colors/blush-pink
- **Denim** #1560bd [pool] — Designers have shipped Denim with #6599a4: 6 real palettes, including Dusk and Open House, as the lead colour. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Open House (https://brandsweets.com/palettes/clean#open-house), Peacock (https://brandsweets.com/palettes/vivid#peacock), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 8 real palettes, including Ford's brand system and SoFi's brand system put Midnight Blue beside #6599a4, as the lead colour. Seen in: Ford (https://brandsweets.com/colors/brands/ford-com), SoFi (https://brandsweets.com/colors/brands/sofi-com), Open House (https://brandsweets.com/palettes/clean#open-house), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/midnightblue
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #6599a4: 4 real palettes, including Ink Wash and First Snow, as the lead colour. Seen in: Ink Wash (https://brandsweets.com/palettes/dark#ink-wash), First Snow (https://brandsweets.com/palettes/cool#first-snow), Stone (https://brandsweets.com/palettes/neutral#stone), Crypto.com (https://brandsweets.com/colors/brands/crypto-com). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #6599a4 in 6 real palettes, including Confluent's brand system and Brilliant's brand system, as the supporting colour. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Elastic (https://brandsweets.com/colors/brands/elastic-co), Slate Workspace (https://brandsweets.com/palettes/minimal#slate-workspace). — https://brandsweets.com/colors/royalblue

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

- On white (#ffffff): 3.16:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #4f7e87 (4.5:1); AA: background → #292929 (4.6:1); AAA: text → #3a5d64 (7.17:1)
- On black (#000000): 6.65:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #6b9ea8 (7.08:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/6599a4-a2b6be-df4e7c-1f252d-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: "#6599a4" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.