# #ef0901

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

## Values

- Hex: `#ef0901`
- RGB: rgb(239, 9, 1)
- HSL: hsl(2, 99%, 47%)
- OKLCH: oklch(0.6 0.244 29.5)
- Relative luminance: 0.1855
- Nearest named color: Alarm (#ec0003, Δ 0.763) — https://brandsweets.com/colors/alarm
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/ef0901

## Tints & shades

- Tints (toward white): #fe140b, #fe2c25, #fe453e, #fe5d58, #fe7b76, #fe938f, #ffaca9, #ffc4c2, #ffdddb, #fff5f5
- Shades (toward black): #da0801, #c10701, #ad0701, #980601, #840501, #6b0401, #560300, #420300, #290200, #140100

## Harmonies

- Complementary: #01e7ef
- Analogous: #ef0170, #ef8001
- Triadic: #01ef09, #0901ef
- Split-complementary: #01ef80, #0170ef
- Tetradic: #70ef01, #01e7ef, #8001ef

## Colors that go with #ef0901

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 #ef0901: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Logitech (https://brandsweets.com/colors/brands/logitech-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Audi (https://brandsweets.com/colors/brands/audi-com). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #ef0901 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Vercel (https://brandsweets.com/colors/brands/vercel), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), WWE (https://brandsweets.com/colors/brands/wwe-com), Toyota (https://brandsweets.com/colors/brands/toyota-com). — https://brandsweets.com/colors/royalblue
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #ef0901 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Netflix (https://brandsweets.com/colors/brands/netflix), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Coinbase (https://brandsweets.com/colors/brands/coinbase), Wellness (https://brandsweets.com/palettes/warm#wellness). — https://brandsweets.com/colors/seagreen
- **Steel Blue** #4682b4 [harmony, pool: split] — Steel Blue is a split-complement of #ef0901: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Wired (https://brandsweets.com/colors/brands/wired-com), NASCAR (https://brandsweets.com/colors/brands/nascar-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #ef0901 in 7 real palettes, including Wired's brand system and McDonald's's brand system, as the accent. Seen in: Wired (https://brandsweets.com/colors/brands/wired-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Google (https://brandsweets.com/colors/brands/google-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 8 real palettes, including native Cybersecurity's brand system and Doordash's brand system put Blue beside #ef0901, as the accent. Seen in: native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-com), Doordash (https://brandsweets.com/colors/brands/doordash-com), Gap (https://brandsweets.com/colors/brands/gap-com), Glossier (https://brandsweets.com/colors/brands/glossier-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #ef0901: 5 real palettes, including Walgreens's brand system and NASA's brand system, as the accent. Seen in: Walgreens (https://brandsweets.com/colors/brands/walgreens-com), NASA (https://brandsweets.com/colors/brands/nasa-gov), Behance (https://brandsweets.com/colors/brands/behance-net), Tide (https://brandsweets.com/colors/brands/tide-com). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #ef0901: 19 real palettes, including Netflix's brand system and ElevenLabs's brand system, as the accent. Seen in: Netflix (https://brandsweets.com/colors/brands/netflix), ElevenLabs (https://brandsweets.com/colors/brands/elevenlabs-io), L'Oréal (https://brandsweets.com/colors/brands/loreal-com), YouTube (https://brandsweets.com/colors/brands/youtube-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 4.46:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #e90901 (4.66:1); AA: background → #050505 (4.57:1); AAA: text → #b20701 (7.18:1)
- On black (#000000): 4.71:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #fe625d (7.12:1)

## Brands using this color

- **Vercel** — danger #ee0000 (Δ 0.39) — https://brandsweets.com/colors/brands/vercel
- **Tinder** — secondary #ec180e (Δ 0.689) — https://brandsweets.com/colors/brands/tinder-com
- **native Cybersecurity** — secondary #ec0000 (Δ 0.753) — https://brandsweets.com/colors/brands/crowdstrike-com
- **Databricks** — secondary #eb1600 (Δ 0.813) — https://brandsweets.com/colors/brands/databricks-com
- **Doordash** — secondary #eb1700 (Δ 0.832) — https://brandsweets.com/colors/brands/doordash-com
- **Twitch** — accent #eb0400 (Δ 0.882) — https://brandsweets.com/colors/brands/twitch-tv
- **Wired** — secondary #eb0000 (Δ 0.949) — https://brandsweets.com/colors/brands/wired-com
- **LG** — secondary #ea1917 (Δ 1.089) — https://brandsweets.com/colors/brands/lg-com
- **Gatorade** — secondary #ea0000 (Δ 1.148) — https://brandsweets.com/colors/brands/gatorade-com
- **Mattel** — secondary #ee0024 (Δ 1.65) — https://brandsweets.com/colors/brands/mattel-com
- **Pizza Hut** — secondary #e91c24 (Δ 1.678) — https://brandsweets.com/colors/brands/pizzahut-com
- **Vodafone** — primary #e60000 (Δ 1.959) — https://brandsweets.com/colors/brands/vodafone-com
- **Vodafone** — accent #e60000 (Δ 1.959) — https://brandsweets.com/colors/brands/vodafone-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/ef0901-c4a29c-62cb9c-2d261f-f1e9ed?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: "#ef0901" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.