# #4139ea

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

## Values

- Hex: `#4139ea`
- RGB: rgb(65, 57, 234)
- HSL: hsl(243, 81%, 57%)
- OKLCH: oklch(0.489 0.252 273.9)
- Relative luminance: 0.0999
- Nearest named color: Meteor Shower (#5533ff, Δ 4.202) — https://brandsweets.com/colors/meteor-shower
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/4139ea

## Tints & shades

- Tints (toward white): #534bec, #655dee, #7670f0, #8882f2, #9e99f4, #b0acf6, #c1bef8, #d3d1fa, #e5e3fc, #f6f6fe
- Shades (toward black): #2b21e8, #2016d4, #1c14bd, #1911a6, #150f8f, #110c73, #0e0a5c, #0a0745, #06042a, #030212

## Harmonies

- Complementary: #e1ea39
- Analogous: #3988ea, #9a39ea
- Triadic: #ea4139, #39ea41
- Split-complementary: #ea9a39, #88ea39
- Tetradic: #ea3988, #e1ea39, #39ea9a

## Colors that go with #4139ea

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 #4139ea: softer than #000 and cool enough to feel like part of the same palette. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), HP (https://brandsweets.com/colors/brands/hp-com), UEFA (https://brandsweets.com/colors/brands/uefa-com), Zoom (https://brandsweets.com/colors/brands/zoom-us). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #4139ea — 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), Kia (https://brandsweets.com/colors/brands/kia-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com). — https://brandsweets.com/colors/seagreen
- **Amber** #ffbf00 [pool] — Amber is paired with #4139ea in 6 real palettes, including Walmart's brand system and Binance's brand system, as the accent. Seen in: Walmart (https://brandsweets.com/colors/brands/walmart-com), Binance (https://brandsweets.com/colors/brands/binance-com), 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 #4139ea: 11 real palettes, including Zillow's brand system and Oreo's brand system, as the supporting colour. Seen in: Zillow (https://brandsweets.com/colors/brands/zillow-com), Oreo (https://brandsweets.com/colors/brands/oreo-com), NHL (https://brandsweets.com/colors/brands/nhl-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #4139ea: 10 real palettes, including Qualcomm's brand system and Roblox's brand system, as the supporting colour. Seen in: Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Roblox (https://brandsweets.com/colors/brands/roblox-com), Canva (https://brandsweets.com/colors/brands/canva-com), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #4139ea in 13 real palettes, including Coinbase's brand system and Behance's brand system. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Behance (https://brandsweets.com/colors/brands/behance-net), Chase (https://brandsweets.com/colors/brands/chase-com), Toyota (https://brandsweets.com/colors/brands/toyota-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #4139ea: 4 real palettes, including Warp's brand system and Kraken's brand system, as the lead colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Kraken (https://brandsweets.com/colors/brands/kraken-com), Calm (https://brandsweets.com/colors/brands/calm-com), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #4139ea: 8 real palettes, including Pixar's brand system and Dairy Queen's brand system, as the supporting colour. Seen in: Pixar (https://brandsweets.com/colors/brands/pixar-com), Dairy Queen (https://brandsweets.com/colors/brands/dairyqueen-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Intel (https://brandsweets.com/colors/brands/intel-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 7:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 3:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #6962ef (4.59:1); AA: background → #d1d1d1 (4.59:1); AAA: text → #918cf3 (7.25:1); AAA: background → #ffffff (7:1)

## 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/4139ea-a39cc4-dfa04e-261f2d-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: "#4139ea" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.