# #63a5ab

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

## Values

- Hex: `#63a5ab`
- RGB: rgb(99, 165, 171)
- HSL: hsl(185, 30%, 53%)
- OKLCH: oklch(0.68 0.068 203.1)
- Relative luminance: 0.325
- Nearest named color: Atlas Cedar (#5ca0a7, Δ 1.684) — https://brandsweets.com/colors/atlas-cedar
- Moods: cool, muted
- Page: https://brandsweets.com/colors/63a5ab

## Tints & shades

- Tints (toward white): #74afb4, #81b6bb, #92c0c4, #9fc8cb, #afd1d4, #bdd9db, #cde2e4, #dbeaeb, #ebf4f4, #f8fbfb
- Shades (toward black): #56999f, #4d898f, #44797e, #3b696d, #345c60, #2b4c50, #223d3f, #192d2e, #101d1e, #070d0d

## Harmonies

- Complementary: #ab6963
- Analogous: #63ab8d, #6381ab
- Triadic: #ab63a5, #a5ab63
- Split-complementary: #ab6381, #ab8d63
- Tetradic: #8d63ab, #ab6963, #81ab63

## Colors that go with #63a5ab

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 #63a5ab: softer than #000 and cool enough to feel like part of the same palette. Seen in: Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), N26 (https://brandsweets.com/colors/brands/n26-com), Lido (https://brandsweets.com/palettes/vivid#lido), Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue). — https://brandsweets.com/colors/charcoal
- **Terracotta** #e2725b [harmony, pool: complementary] — Terracotta sits directly opposite #63a5ab 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), Harbour (https://brandsweets.com/palettes/cool#harbour). — https://brandsweets.com/colors/terracotta
- **Burlywood** #deb887 [pool] — Burlywood is paired with #63a5ab in 4 real palettes, including Coastal and Polaroid, as the accent. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Polaroid (https://brandsweets.com/palettes/light#polaroid), Kiln (https://brandsweets.com/palettes/dark#kiln), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard). — https://brandsweets.com/colors/burlywood
- **Copper** #b87333 [pool] — Designers have shipped Copper with #63a5ab: 5 real palettes, including Dusk and Riverbed, as the accent. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Atelier (https://brandsweets.com/palettes/elegant#atelier). — https://brandsweets.com/colors/copper
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #63a5ab in 5 real palettes, including Oatmeal and Undergrowth, as the lead colour. Seen in: Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal), Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove). — https://brandsweets.com/colors/darkolivegreen
- **Denim** #1560bd [pool] — Designers have shipped Denim with #63a5ab: 6 real palettes, including Open House and Dusk, as the lead colour. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Dusk (https://brandsweets.com/palettes/cool#dusk), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Peacock (https://brandsweets.com/palettes/vivid#peacock). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #63a5ab: 5 real palettes, including Studio Grey and Unity's brand system, as the accent. Seen in: Studio Grey (https://brandsweets.com/palettes/minimal#studio-grey), Unity (https://brandsweets.com/colors/brands/unity-com), Patreon (https://brandsweets.com/colors/brands/patreon-com), Spline (https://brandsweets.com/colors/brands/spline-design). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 9 real palettes, including Ford's brand system and Open House put Midnight Blue beside #63a5ab, as the lead colour. Seen in: Ford (https://brandsweets.com/colors/brands/ford-com), Open House (https://brandsweets.com/palettes/clean#open-house), Confluent (https://brandsweets.com/colors/brands/confluent-io), SoFi (https://brandsweets.com/colors/brands/sofi-com). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 2.8:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #467c81 (4.71:1); AA: background → #333333 (4.51:1); AAA: text → #345c60 (7.38:1); AAA: background → #0a0a0a (7.07:1)
- On black (#000000): 7.5:1 — AA pass, AA-large pass, AAA pass

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/63a5ab-a2b8be-df4e88-1f262d-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: "#63a5ab" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.