# #427bbd

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

## Values

- Hex: `#427bbd`
- RGB: rgb(66, 123, 189)
- HSL: hsl(212, 48%, 50%)
- OKLCH: oklch(0.575 0.119 253.5)
- Relative luminance: 0.19
- Nearest named color: Haddock’s Sweater (#277aba, Δ 2.144) — https://brandsweets.com/colors/haddocks-sweater
- Moods: cool, modern
- Page: https://brandsweets.com/colors/427bbd

## Tints & shades

- Tints (toward white): #5589c3, #6896ca, #77a0cf, #8aadd6, #9dbbdd, #b0c8e3, #c3d5ea, #d2dfef, #e5edf6, #f7fafc
- Shades (toward black): #3c6faa, #36659b, #305988, #2a4f79, #244366, #1d3653, #182c44, #112031, #0c1622, #050a0f

## Harmonies

- Complementary: #bd8442
- Analogous: #42b9bd, #4642bd
- Triadic: #bd427b, #7bbd42
- Split-complementary: #bd4642, #b9bd42
- Tetradic: #bd42b9, #bd8442, #42bd46

## Colors that go with #427bbd

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 #427bbd: softer than #000 and cool enough to feel like part of the same palette. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Disney (https://brandsweets.com/colors/brands/disney-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #427bbd 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), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #427bbd in 10 real palettes, including Wired's brand system and Lemon Squeezy's brand system, as the accent. Seen in: Wired (https://brandsweets.com/colors/brands/wired-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 12 real palettes, including Qualcomm's brand system and Activision's brand system put Blue beside #427bbd, as the accent. Seen in: Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Activision (https://brandsweets.com/colors/brands/activision-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Pixar (https://brandsweets.com/colors/brands/pixar-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #427bbd: 9 real palettes, including Hershey's's brand system and Glacier, as the supporting colour. Seen in: 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), Intel (https://brandsweets.com/colors/brands/intel-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #427bbd: 4 real palettes, including Coca-Cola's brand system and NBA's brand system, as the supporting colour. Seen in: Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), NBA (https://brandsweets.com/colors/brands/nba-com), Webflow (https://brandsweets.com/colors/brands/webflow-com), Arctic (https://brandsweets.com/palettes/clean#arctic). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #427bbd in 15 real palettes, including NASCAR's brand system and State Farm's brand system, as the supporting colour. Seen in: NASCAR (https://brandsweets.com/colors/brands/nascar-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #427bbd: 8 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): 4.38:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #4179b9 (4.51:1); AA: background → #0a0a0a (4.52:1); AAA: text → #305988 (7.22:1)
- On black (#000000): 4.8:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #709bcd (7.26:1)

## Brands using this color

- **Honda** — accent #337ab7 (Δ 1.653) — https://brandsweets.com/colors/brands/honda-com

## Fonts for this mood

- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/427bbd-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: "#427bbd" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.