# #3878bc

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

## Values

- Hex: `#3878bc`
- RGB: rgb(56, 120, 188)
- HSL: hsl(211, 54%, 48%)
- OKLCH: oklch(0.564 0.124 252.1)
- Relative luminance: 0.179
- Nearest named color: Haddock’s Sweater (#277aba, Δ 1.281) — https://brandsweets.com/colors/haddocks-sweater
- Moods: cool, modern
- Page: https://brandsweets.com/colors/3878bc

## Tints & shades

- Tints (toward white): #4685c8, #5a92ce, #6e9fd4, #81acd9, #95b9df, #a9c6e5, #bcd3eb, #d0e0f1, #e4edf7, #f7fafd
- Shades (toward black): #346ead, #2e6299, #295889, #234b76, #1e4166, #1a3756, #142b43, #0f2133, #09141f, #050a10

## Harmonies

- Complementary: #bc7d38
- Analogous: #38babc, #3b38bc
- Triadic: #bc3878, #78bc38
- Split-complementary: #bc3b38, #babc38
- Tetradic: #bc38ba, #bc7d38, #38bc3b

## Colors that go with #3878bc

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 #3878bc: softer than #000 and cool enough to feel like part of the same palette. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Disney (https://brandsweets.com/colors/brands/disney-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #3878bc — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: NASCAR (https://brandsweets.com/colors/brands/nascar-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/crimson
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #3878bc 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 #3878bc 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), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 13 real palettes, including Activision's brand system and Pixar's brand system put Blue beside #3878bc, as the accent. Seen in: Activision (https://brandsweets.com/colors/brands/activision-com), Pixar (https://brandsweets.com/colors/brands/pixar-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #3878bc: 10 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
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #3878bc: 7 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), Venmo (https://brandsweets.com/colors/brands/venmo-com), Telegram (https://brandsweets.com/colors/brands/telegram-org). — https://brandsweets.com/colors/deepskyblue
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #3878bc: 6 real palettes, including Venmo's brand system and Apple's brand system, as the lead colour. Seen in: Venmo (https://brandsweets.com/colors/brands/venmo-com), Apple (https://brandsweets.com/colors/brands/apple-com), ASUS (https://brandsweets.com/colors/brands/asus-com), HashiCorp (https://brandsweets.com/colors/brands/hashicorp-com). — https://brandsweets.com/colors/dodgerblue

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

- On white (#ffffff): 4.58:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #2a5a8d (7.13:1)
- On black (#000000): 4.58:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #669ad1 (7.11:1)

## Brands using this color

- **American Express** — primary #2e77bc (Δ 0.837) — https://brandsweets.com/colors/brands/americanexpress-com
- **Dollar General** — accent #2a77bd (Δ 1.085) — https://brandsweets.com/colors/brands/dollargeneral-com
- **Honda** — accent #337ab7 (Δ 1.124) — https://brandsweets.com/colors/brands/honda-com
- **Astro** — primary #3178c6 (Δ 1.602) — https://brandsweets.com/colors/brands/astro-build

## 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/3878bc-9cabc4-df534e-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: "#3878bc" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.