# #eff381

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

## Values

- Hex: `#eff381`
- RGB: rgb(239, 243, 129)
- HSL: hsl(62, 83%, 73%)
- OKLCH: oklch(0.938 0.138 110.6)
- Relative luminance: 0.8404
- Nearest named color: Banana (#fffc79, Δ 3.456) — https://brandsweets.com/colors/banana
- Moods: vivid, light, clean
- Page: https://brandsweets.com/colors/eff381

## Tints & shades

- Tints (toward white): #f1f58f, #f2f598, #f4f7a6, #f5f8b0, #f7f9be, #f8fac7, #fafbd5, #fbfcde, #fdfdec, #fefef6
- Shades (toward black): #ebf060, #e7ed40, #e3ea1f, #ccd214, #b0b611, #91950e, #71750b, #515408, #323305, #121302

## Harmonies

- Complementary: #8581f3
- Analogous: #f3be81, #b6f381
- Triadic: #81eff3, #f381ef
- Split-complementary: #81b6f3, #be81f3
- Tetradic: #81f3be, #8581f3, #f381b6

## Colors that go with #eff381

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 body-text near-black for #eff381: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Zendesk (https://brandsweets.com/colors/brands/zendesk-com), Lido (https://brandsweets.com/palettes/vivid#lido), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Lilac** #c8a2c8 [harmony, pool: complementary] — Lilac sits directly opposite #eff381 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Phantom: The money app that'll take you placesLogo PhantomLogo PhantomLogo Phantom (https://brandsweets.com/colors/brands/phantom-com). — https://brandsweets.com/colors/lilac
- **Blue** #0000ff [pool] — 4 real palettes, including Bumble's brand system and Snapchat's brand system put Blue beside #eff381, as the supporting colour. Seen in: Bumble (https://brandsweets.com/colors/brands/bumble-com), Snapchat (https://brandsweets.com/colors/brands/snapchat-com), Binance (https://brandsweets.com/colors/brands/binance-com), Robinhood (https://brandsweets.com/colors/brands/robinhood-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #eff381 in 9 real palettes, including Lay's's brand system and Ferrari's brand system, as the accent. Seen in: Lay's (https://brandsweets.com/colors/brands/lays-com), Ferrari (https://brandsweets.com/colors/brands/ferrari-com), Diner (https://brandsweets.com/palettes/vivid#diner), Tequila Sunrise (https://brandsweets.com/palettes/vivid#tequila-sunrise). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #eff381: 6 real palettes, including FIFA's brand system and Ikea's brand system, as the supporting colour. Seen in: FIFA (https://brandsweets.com/colors/brands/fifa-com), Ikea (https://brandsweets.com/colors/brands/ikea-com), LEGO (https://brandsweets.com/colors/brands/lego-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/denim
- **Red** #ff0000 [pool] — Red is paired with #eff381 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
- **Sky Blue** #87ceeb [pool] — Sky Blue is paired with #eff381 in 4 real palettes, including Pastel Pop and Oatly's brand system, as the supporting colour. Seen in: Pastel Pop (https://brandsweets.com/palettes/playful#pastel-pop), Oatly (https://brandsweets.com/colors/brands/oatly-com), Coastal (https://brandsweets.com/palettes/cool#coastal), Still Water (https://brandsweets.com/palettes/cool#still-water). — https://brandsweets.com/colors/skyblue
- **Taupe** #483c32 [pool] — Taupe is paired with #eff381 in 17 real palettes, including Crayon Box and Nursery, as the text colour against it. Seen in: Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Nursery (https://brandsweets.com/palettes/light#nursery), Blossom (https://brandsweets.com/palettes/light#blossom), Meadow (https://brandsweets.com/palettes/light#meadow). — https://brandsweets.com/colors/taupe

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

- On white (#ffffff): 1.18:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #76790b (4.66:1); AA: background → #6b6b6b (4.52:1); AAA: text → #565908 (7.43:1); AAA: background → #4d4d4d (7.17:1)
- On black (#000000): 17.81:1 — AA pass, AA-large pass, AAA pass

## Fonts for this mood

- clean: https://brandsweets.com/fonts/mood/clean

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/eff381-babea2-4e8fdf-272d1f-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: "#eff381" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.