# #3f45f3

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

## Values

- Hex: `#3f45f3`
- RGB: rgb(63, 69, 243)
- HSL: hsl(238, 88%, 60%)
- OKLCH: oklch(0.513 0.251 271.8)
- Relative luminance: 0.1178
- Nearest named color: Meteor Shower (#5533ff, Δ 3.825) — https://brandsweets.com/colors/meteor-shower
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/3f45f3

## Tints & shades

- Tints (toward white): #5258f4, #666af5, #7478f6, #878bf7, #9a9df9, #aeb0fa, #c1c3fb, #cfd1fc, #e2e3fd, #f5f6fe
- Shades (toward black): #2229f1, #0f16eb, #0d14ce, #0c11b6, #0a0f99, #080c7d, #060a65, #050748, #030530, #010213

## Harmonies

- Complementary: #f3ed3f
- Analogous: #3f9ff3, #933ff3
- Triadic: #f33f45, #45f33f
- Split-complementary: #f3933f, #9ff33f
- Tetradic: #f33f9f, #f3ed3f, #3ff393

## Colors that go with #3f45f3

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 #3f45f3: softer than #000 and cool enough to feel like part of the same palette. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), Zoom (https://brandsweets.com/colors/brands/zoom-us), Docker (https://brandsweets.com/colors/brands/docker-com), HP (https://brandsweets.com/colors/brands/hp-com). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #3f45f3 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Intel (https://brandsweets.com/colors/brands/intel-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/seagreen
- **Amber** #ffbf00 [pool] — Amber is paired with #3f45f3 in 6 real palettes, including Walmart's brand system and Mastodon hosted on mastodon.social's brand system, as the accent. Seen in: Walmart (https://brandsweets.com/colors/brands/walmart-com), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social), NBA (https://brandsweets.com/colors/brands/nba-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #3f45f3: 12 real palettes, including NHL's brand system and Nokia's brand system, as the accent. Seen in: NHL (https://brandsweets.com/colors/brands/nhl-com), Nokia (https://brandsweets.com/colors/brands/nokia-com), Nivea (https://brandsweets.com/colors/brands/nivea-com), Zillow (https://brandsweets.com/colors/brands/zillow-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #3f45f3: 10 real palettes, including Roblox's brand system and Qualcomm's brand system, as the supporting colour. Seen in: Roblox (https://brandsweets.com/colors/brands/roblox-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Webflow (https://brandsweets.com/colors/brands/webflow-com), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #3f45f3 in 12 real palettes, including Coinbase's brand system and Toyota's brand system. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Toyota (https://brandsweets.com/colors/brands/toyota-com), Chase (https://brandsweets.com/colors/brands/chase-com), WWE (https://brandsweets.com/colors/brands/wwe-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #3f45f3: 4 real palettes, including Warp's brand system and Elastic's brand system, as the lead colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Elastic (https://brandsweets.com/colors/brands/elastic-co), Calm (https://brandsweets.com/colors/brands/calm-com), Kraken (https://brandsweets.com/colors/brands/kraken-com). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #3f45f3: 13 real palettes, including Dairy Queen's brand system and Pixar's brand system, as the supporting colour. Seen in: Dairy Queen (https://brandsweets.com/colors/brands/dairyqueen-com), Pixar (https://brandsweets.com/colors/brands/pixar-com), Chase (https://brandsweets.com/colors/brands/chase-com), Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 6.26:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #3137f2 (7.1:1)
- On black (#000000): 3.36:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #6166f5 (4.73:1); AA: background → #dbdbdb (4.52:1); AAA: text → #878bf7 (7.07:1)

## 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/3f45f3-9f9cc4-df944e-251f2d-e9edf1?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: "#3f45f3" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.