# #3377e6

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

## Values

- Hex: `#3377e6`
- RGB: rgb(51, 119, 230)
- HSL: hsl(217, 78%, 55%)
- OKLCH: oklch(0.587 0.182 259.8)
- Relative luminance: 0.1961
- Nearest named color: Blue Öyster Cult (#5577ee, Δ 3.387) — https://brandsweets.com/colors/blue-oyster-cult
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/3377e6

## Tints & shades

- Tints (toward white): #4583e8, #5c92eb, #6e9fed, #80abef, #97baf2, #a9c6f4, #bbd2f7, #cddef9, #e4edfc, #f6f9fe
- Shades (toward black): #1c68e3, #195ecc, #1653b6, #14499f, #113f88, #0d326d, #0b2856, #081d40, #051329, #020812

## Harmonies

- Complementary: #e6a133
- Analogous: #33d1e6, #4833e6
- Triadic: #e63377, #77e633
- Split-complementary: #e64833, #d1e633
- Tetradic: #e633d1, #e6a133, #33e648

## Colors that go with #3377e6

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 #3377e6: softer than #000 and cool enough to feel like part of the same palette. Seen in: Disney (https://brandsweets.com/colors/brands/disney-com), Docker (https://brandsweets.com/colors/brands/docker-com), Zoom (https://brandsweets.com/colors/brands/zoom-us), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #3377e6 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com), Behance (https://brandsweets.com/colors/brands/behance-net), NASCAR (https://brandsweets.com/colors/brands/nascar-com). — https://brandsweets.com/colors/crimson
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #3377e6 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). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #3377e6 in 12 real palettes, including Walmart's brand system and Google's brand system, as the accent. Seen in: Walmart (https://brandsweets.com/colors/brands/walmart-com), Google (https://brandsweets.com/colors/brands/google-com), NBA (https://brandsweets.com/colors/brands/nba-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 14 real palettes, including BBC's brand system and Readymag's brand system put Blue beside #3377e6, as the accent. Seen in: BBC (https://brandsweets.com/colors/brands/bbc-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), EA (https://brandsweets.com/colors/brands/ea-com), Penpot (https://brandsweets.com/colors/brands/penpot-app). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #3377e6: 12 real palettes, including Carrefour's brand system and Nokia's brand system, as the accent. Seen in: Carrefour (https://brandsweets.com/colors/brands/carrefour-com), Nokia (https://brandsweets.com/colors/brands/nokia-com), Behance (https://brandsweets.com/colors/brands/behance-net), 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 #3377e6: 9 real palettes, including Patreon's brand system and Elastic's brand system, as the supporting colour. Seen in: Patreon (https://brandsweets.com/colors/brands/patreon-com), Elastic (https://brandsweets.com/colors/brands/elastic-co), Astro (https://brandsweets.com/colors/brands/astro-build), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/deepskyblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #3377e6: 6 real palettes, including Honda's brand system and Nissan's brand system, as the supporting colour. Seen in: Honda (https://brandsweets.com/colors/brands/honda-com), Nissan (https://brandsweets.com/colors/brands/nissanusa-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com), Bose (https://brandsweets.com/colors/brands/bose-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 4.27:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #2a71e5 (4.57:1); AA: background → #0d0d0d (4.56:1); AAA: text → #1653b6 (7.13:1)
- On black (#000000): 4.92:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #6096eb (7.06:1)

## Brands using this color

- **Guinness** — secondary #1a73e8 (Δ 1.91) — https://brandsweets.com/colors/brands/guinness-com

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- 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/3377e6-9ca7c4-df624e-201f2d-e9f0f1?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: "#3377e6" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.