# #ffef42

A color — warm, vivid, playful, bold. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#ffef42`
- RGB: rgb(255, 239, 66)
- HSL: hsl(55, 100%, 63%)
- OKLCH: oklch(0.937 0.18 103.9)
- Relative luminance: 0.8339
- Nearest named color: Buttercup Glow (#f1f458, Δ 2.116) — https://brandsweets.com/colors/buttercup-glow
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/ffef42

## Tints & shades

- Tints (toward white): #fff157, #fff266, #fff47a, #fff58a, #fff79e, #fff8ad, #fffac2, #fffbd1, #fffde5, #fffef5
- Shades (toward black): #ffed24, #ffea05, #e6d200, #c7b600, #ad9f00, #8f8300, #706700, #524b00, #332f00, #141300

## Harmonies

- Complementary: #4252ff
- Analogous: #ff9142, #b0ff42
- Triadic: #42ffef, #ef42ff
- Split-complementary: #42b0ff, #9142ff
- Tetradic: #42ff91, #4252ff, #ff42b0

## Colors that go with #ffef42

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 #ffef42 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 Bumble's brand system put Blue beside #ffef42, as the supporting colour. Seen in: Snapchat (https://brandsweets.com/colors/brands/snapchat-com), Bumble (https://brandsweets.com/colors/brands/bumble-com), Binance (https://brandsweets.com/colors/brands/binance-com), Robinhood (https://brandsweets.com/colors/brands/robinhood-com). — https://brandsweets.com/colors/blue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #ffef42: 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 #ffef42 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
- **Deep Sky Blue** #00bfff [harmony, pool: split] — Deep Sky Blue is a split-complement of #ffef42: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #ffef42: 6 real palettes, including Ikea's brand system and FIFA's brand system, as the accent. Seen in: Ikea (https://brandsweets.com/colors/brands/ikea-com), FIFA (https://brandsweets.com/colors/brands/fifa-com), LEGO (https://brandsweets.com/colors/brands/lego-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/denim
- **Taupe** #483c32 [pool] — Taupe is paired with #ffef42 in 9 real palettes, including Crayon Box and Calvin Klein's brand system, as the text colour against it. Seen in: Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Calvin Klein (https://brandsweets.com/colors/brands/calvinklein-us), Tommy Hilfiger (https://brandsweets.com/colors/brands/tommy-com), 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 #ffef42, 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

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

- On white (#ffffff): 1.19:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #807500 (4.71:1); AA: background → #696969 (4.62:1); AAA: text → #615900 (7.15:1); AAA: background → #4d4d4d (7.12:1)
- On black (#000000): 17.68:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Star Wars** — primary #ffe81f (Δ 1.878) — https://brandsweets.com/colors/brands/starwars-com
- **Heineken** — secondary #fff000 (Δ 1.921) — https://brandsweets.com/colors/brands/heineken-com

## Fonts for this mood

- warm: https://brandsweets.com/fonts/mood/warm
- playful: https://brandsweets.com/fonts/mood/playful
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/ffef42-bdbea2-4ea0df-282d1f-f1ede9?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: "#ffef42" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.