# #effa57

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

## Values

- Hex: `#effa57`
- RGB: rgb(239, 250, 87)
- HSL: hsl(64, 94%, 66%)
- OKLCH: oklch(0.948 0.18 113.1)
- Relative luminance: 0.8741
- Nearest named color: Buttercup Glow (#f1f458, Δ 1.555) — https://brandsweets.com/colors/buttercup-glow
- Moods: vivid
- Page: https://brandsweets.com/colors/effa57

## Tints & shades

- Tints (toward white): #f0fa66, #f2fb74, #f4fb88, #f5fc97, #f6fca6, #f8fdb5, #f9fdc4, #fbfed7, #fdfee6, #fefff5
- Shades (toward black): #ecf939, #e9f81b, #d9e907, #becb06, #a2ad05, #868f04, #6a7204, #4a4f02, #2e3102, #131401

## Harmonies

- Complementary: #6257fa
- Analogous: #fab357, #9dfa57
- Triadic: #57effa, #fa57ef
- Split-complementary: #579dfa, #b357fa
- Tetradic: #57fab3, #6257fa, #fa579d

## Colors that go with #effa57

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

- **Lilac** #c8a2c8 [harmony, pool: complementary] — Lilac sits directly opposite #effa57 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 Snapchat's brand system and Robinhood's brand system put Blue beside #effa57, as the supporting colour. Seen in: Snapchat (https://brandsweets.com/colors/brands/snapchat-com), Robinhood (https://brandsweets.com/colors/brands/robinhood-com), Bumble (https://brandsweets.com/colors/brands/bumble-com), Binance (https://brandsweets.com/colors/brands/binance-com). — https://brandsweets.com/colors/blue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #effa57: 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), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [pool] — Crimson is paired with #effa57 in 7 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), Diner (https://brandsweets.com/palettes/vivid#diner). — https://brandsweets.com/colors/crimson
- **Red** #ff0000 [pool] — Red is paired with #effa57 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 #effa57 in 7 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
- **Tomato** #ff6347 [pool] — 4 real palettes, including Crayon Box and Night Market put Tomato beside #effa57, as the lead colour. Seen in: Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Night Market (https://brandsweets.com/palettes/vivid#night-market), Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/tomato
- **Violet** #ee82ee [harmony, pool: split] — Violet is a split-complement of #effa57: 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

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

- On white (#ffffff): 1.14:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #747c04 (4.54:1); AA: background → #6b6b6b (4.69:1); AAA: text → #535903 (7.51:1); AAA: background → #4f4f4f (7.21:1)
- On black (#000000): 18.48:1 — AA pass, AA-large pass, AAA pass

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/effa57-b9bea2-4e8adf-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: "#effa57" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.