# #378df6

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

## Values

- Hex: `#378df6`
- RGB: rgb(55, 141, 246)
- HSL: hsl(213, 91%, 59%)
- OKLCH: oklch(0.645 0.177 255.5)
- Relative luminance: 0.2652
- Nearest named color: dodgerblue (#1e90ff, Δ 1.671) — https://brandsweets.com/colors/dodgerblue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/378df6

## Tints & shades

- Tints (toward white): #4b98f7, #5ea3f7, #72aef8, #85b9f9, #99c5fa, #a7cdfb, #bbd8fc, #cee3fd, #e2eefe, #f5f9ff
- Shades (toward black): #1f7ff4, #0b6fea, #0a64d1, #0856b4, #074a9c, #063c7f, #053166, #032349, #021731, #010913

## Harmonies

- Complementary: #f6a037
- Analogous: #37ecf6, #4137f6
- Triadic: #f6378d, #8df637
- Split-complementary: #f64137, #ecf637
- Tetradic: #f637ec, #f6a037, #37f641

## Colors that go with #378df6

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 #378df6: softer than #000 and cool enough to feel like part of the same palette. Seen in: Blizzard (https://brandsweets.com/colors/brands/blizzard-com), Disney (https://brandsweets.com/colors/brands/disney-com), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Red** #ff0000 [harmony, pool: triadic] — Red completes a triad with #378df6 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Databricks (https://brandsweets.com/colors/brands/databricks-com), Vercel (https://brandsweets.com/colors/brands/vercel), Rotten Tomatoes (https://brandsweets.com/colors/brands/rottentomatoes-com), Wired (https://brandsweets.com/colors/brands/wired-com). — https://brandsweets.com/colors/red
- **Amber** #ffbf00 [pool] — Amber is paired with #378df6 in 11 real palettes, including Google's brand system and Heatwave, as the accent. Seen in: Google (https://brandsweets.com/colors/brands/google-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 11 real palettes, including Unity's brand system and Readymag's brand system put Blue beside #378df6, as the supporting colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Cargo (https://brandsweets.com/colors/brands/cargo-site). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #378df6: 9 real palettes, including Blue Mono and Carrefour's brand system, as the lead colour. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Carrefour (https://brandsweets.com/colors/brands/carrefour-com), Behance (https://brandsweets.com/colors/brands/behance-net), Hershey's (https://brandsweets.com/colors/brands/hersheys-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #378df6 in 9 real palettes, including NASCAR's brand system and Behance's brand system, as the supporting colour. Seen in: NASCAR (https://brandsweets.com/colors/brands/nascar-com), Behance (https://brandsweets.com/colors/brands/behance-net), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), WWE (https://brandsweets.com/colors/brands/wwe-com). — https://brandsweets.com/colors/crimson
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #378df6 in 4 real palettes, including Playground and Elastic's brand system, as the lead colour. Seen in: Playground (https://brandsweets.com/palettes/bold#playground), Elastic (https://brandsweets.com/colors/brands/elastic-co), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), Learning App (https://brandsweets.com/palettes/playful#learning-app). — https://brandsweets.com/colors/darkorange
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #378df6: 9 real palettes, including Venmo's brand system and Patreon's brand system, as the supporting colour. Seen in: Venmo (https://brandsweets.com/colors/brands/venmo-com), Patreon (https://brandsweets.com/colors/brands/patreon-com), Figma (https://brandsweets.com/colors/brands/figma), Telegram (https://brandsweets.com/colors/brands/telegram-org). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 3.33:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #0b6fea (4.69:1); AA: background → #262626 (4.54:1); AAA: text → #0853af (7.33:1)
- On black (#000000): 6.3:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #4b98f7 (7.13:1)

## Brands using this color

- **HashiCorp** — secondary #2b89ff (Δ 1.967) — https://brandsweets.com/colors/brands/hashicorp-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/378df6-9ca9c4-df584e-1f202d-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: "#378df6" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.