# #efcf01

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

## Values

- Hex: `#efcf01`
- RGB: rgb(239, 207, 1)
- HSL: hsl(52, 99%, 47%)
- OKLCH: oklch(0.856 0.177 97.8)
- Relative luminance: 0.6298
- Nearest named color: Banana Brick (#e8d82c, Δ 2.232) — https://brandsweets.com/colors/banana-brick
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/efcf01

## Tints & shades

- Tints (toward white): #fedd0b, #fee125, #fee43e, #fee858, #feec76, #fef08f, #fff3a9, #fff7c2, #fffadb, #fffef5
- Shades (toward black): #dabd01, #c1a701, #ad9601, #988401, #847201, #6b5c01, #564b00, #423900, #292300, #141200

## Harmonies

- Complementary: #0121ef
- Analogous: #ef5801, #97ef01
- Triadic: #01efcf, #cf01ef
- Split-complementary: #0197ef, #5801ef
- Tetradic: #01ef58, #0121ef, #ef0197

## Colors that go with #efcf01

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 #efcf01: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Lido (https://brandsweets.com/palettes/vivid#lido), Coastal (https://brandsweets.com/palettes/cool#coastal), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Lagoon (https://brandsweets.com/palettes/vivid#lagoon). — https://brandsweets.com/colors/charcoal
- **Cornflower Blue** #6495ed [harmony, pool: complementary] — Cornflower Blue sits directly opposite #efcf01 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: NBA (https://brandsweets.com/colors/brands/nba-com), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/cornflowerblue
- **Deep Sky Blue** #00bfff [harmony, pool: split] — Deep Sky Blue is a split-complement of #efcf01: 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), Mistral AI (https://brandsweets.com/colors/brands/mistral-ai). — https://brandsweets.com/colors/deepskyblue
- **Blue** #0000ff [pool] — 4 real palettes, including Binance's brand system and Bumble's brand system put Blue beside #efcf01, as the accent. Seen in: Binance (https://brandsweets.com/colors/brands/binance-com), Bumble (https://brandsweets.com/colors/brands/bumble-com), Snapchat (https://brandsweets.com/colors/brands/snapchat-com), Robinhood (https://brandsweets.com/colors/brands/robinhood-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #efcf01 in 8 real palettes, including Tabloid and Lay's's brand system, as the lead colour. Seen in: Tabloid (https://brandsweets.com/palettes/editorial#tabloid), Lay's (https://brandsweets.com/colors/brands/lays-com), Tequila Sunrise (https://brandsweets.com/palettes/vivid#tequila-sunrise), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #efcf01: 9 real palettes, including LEGO's brand system and McDonald's's brand system, as the accent. Seen in: LEGO (https://brandsweets.com/colors/brands/lego-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Walmart (https://brandsweets.com/colors/brands/walmart-com), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #efcf01: 6 real palettes, including Miro's brand system and Star Wars's brand system, as the accent. Seen in: Miro (https://brandsweets.com/colors/brands/miro-com), Star Wars (https://brandsweets.com/colors/brands/starwars-com), Google (https://brandsweets.com/colors/brands/google-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 4 real palettes, including FIFA's brand system and Southwest Airlines's brand system put Midnight Blue beside #efcf01, as the lead colour. Seen in: FIFA (https://brandsweets.com/colors/brands/fifa-com), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), American Eagle (https://brandsweets.com/colors/brands/ae-com), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 1.54:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #847201 (4.79:1); AA: background → #595959 (4.53:1); AAA: text → #655801 (7.12:1); AAA: background → #3d3d3d (7.03:1)
- On black (#000000): 13.6:1 — AA pass, AA-large pass, AAA pass

## Curated palettes containing it

- **Tabloid** (editorial, bold, vivid) — #e11d48, #111111, #facc15, #ffffff — Red, black and yellow on white is the loudest three-color system in print — use it when headlines are the product. — tool: https://brandsweets.com/palettes/new/e11d48-111111-facc15-ffffff — collection: https://brandsweets.com/palettes/editorial
- **Garnet** (jewel-tones, warm, dark, bold) — #9b1c31, #c2410c, #facc15, #1a0b0f, #fbeaea — Garnet, carnelian and citrine on a wine-black — the warm jewel set for spirits, theatre and jewellery itself. — tool: https://brandsweets.com/palettes/new/9b1c31-c2410c-facc15-1a0b0f-fbeaea — collection: https://brandsweets.com/palettes/jewel-tones

## 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/efcf01-c4c39c-4ea7df-292d1f-f1ece9?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: "#efcf01" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.