# #e4fc31

A color — vivid. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#e4fc31`
- RGB: rgb(228, 252, 49)
- HSL: hsl(67, 97%, 59%)
- OKLCH: oklch(0.942 0.206 116.7)
- Relative luminance: 0.8634
- Nearest named color: Banana Flash (#eefe02, Δ 1.636) — https://brandsweets.com/colors/banana-flash
- Moods: vivid
- Page: https://brandsweets.com/colors/e4fc31

## Tints & shades

- Tints (toward white): #e7fc45, #e9fc59, #ecfd6d, #effd81, #f1fd96, #f3fea5, #f6feb9, #f8fecd, #fbffe1, #fefff5
- Shades (toward black): #e1fb18, #d5f104, #bfd803, #a5ba03, #8ea102, #748302, #5d6902, #434b01, #2c3201, #121400

## Harmonies

- Complementary: #4931fc
- Analogous: #fcae31, #7ffc31
- Triadic: #31e4fc, #fc31e4
- Split-complementary: #317ffc, #ae31fc
- Tetradic: #31fcae, #4931fc, #fc317f

## Colors that go with #e4fc31

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Blue** #0000ff [pool] — 4 real palettes, including Robinhood's brand system and Snapchat's brand system put Blue beside #e4fc31, as the supporting colour. Seen in: Robinhood (https://brandsweets.com/colors/brands/robinhood-com), Snapchat (https://brandsweets.com/colors/brands/snapchat-com), Bumble (https://brandsweets.com/colors/brands/bumble-com), Binance (https://brandsweets.com/colors/brands/binance-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #e4fc31 in 6 real palettes, including Ferrari's brand system and Lay's's brand system, as the lead colour. Seen in: Ferrari (https://brandsweets.com/colors/brands/ferrari-com), Lay's (https://brandsweets.com/colors/brands/lays-com), Tequila Sunrise (https://brandsweets.com/palettes/vivid#tequila-sunrise), Wise (https://brandsweets.com/colors/brands/wise-com). — https://brandsweets.com/colors/crimson
- **Red** #ff0000 [pool] — Red is paired with #e4fc31 in 4 real palettes, including Heineken's brand system and Paddle's brand system, as the accent. Seen in: Heineken (https://brandsweets.com/colors/brands/heineken-com), Paddle (https://brandsweets.com/colors/brands/paddle-com), Phantom: The money app that'll take you placesLogo PhantomLogo PhantomLogo Phantom (https://brandsweets.com/colors/brands/phantom-com), Wise (https://brandsweets.com/colors/brands/wise-com). — https://brandsweets.com/colors/red
- **Taupe** #483c32 [pool] — Taupe is paired with #e4fc31 in 4 real palettes, including Calvin Klein's brand system and Tommy Hilfiger's brand system, as the lead colour. Seen in: Calvin Klein (https://brandsweets.com/colors/brands/calvinklein-us), Tommy Hilfiger (https://brandsweets.com/colors/brands/tommy-com), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove). — https://brandsweets.com/colors/taupe
- **Plum** #dda0dd [harmony: complementary] — Plum sits directly opposite #e4fc31 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/plum
- **Violet** #ee82ee [harmony, pool: split] — Violet is a split-complement of #e4fc31: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Gumroad (https://brandsweets.com/colors/brands/gumroad-com). — https://brandsweets.com/colors/violet
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #e4fc31: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Zendesk (https://brandsweets.com/colors/brands/zendesk-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon). — https://brandsweets.com/colors/charcoal
- **Deep Pink** #ff1493 [pool] — 3 real palettes, including Arcade and JetBrains's brand system put Deep Pink beside #e4fc31, as the lead colour. Seen in: Arcade (https://brandsweets.com/palettes/vivid#arcade), JetBrains (https://brandsweets.com/colors/brands/jetbrains-com), Night Market (https://brandsweets.com/palettes/vivid#night-market). — https://brandsweets.com/colors/deeppink

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

- On white (#ffffff): 1.15:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #6f7e02 (4.51:1); AA: background → #6b6b6b (4.64:1); AAA: text → #505a01 (7.49:1); AAA: background → #4f4f4f (7.13:1)
- On black (#000000): 18.27:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Klaviyo** — secondary #deff00 (Δ 1.721) — https://brandsweets.com/colors/brands/klaviyo-com

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/e4fc31-b8bea2-4e83df-262d1f-f1eee9?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: "#e4fc31" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.