# #ef0105

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

## Values

- Hex: `#ef0105`
- RGB: rgb(239, 1, 5)
- HSL: hsl(359, 99%, 47%)
- OKLCH: oklch(0.598 0.245 28.9)
- Relative luminance: 0.1838
- Nearest named color: Alarm (#ec0003, Δ 0.628) — https://brandsweets.com/colors/alarm
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/ef0105

## Tints & shades

- Tints (toward white): #fe0b0f, #fe2528, #fe3e41, #fe585a, #fe7678, #fe8f91, #ffa9aa, #ffc2c3, #ffdbdc, #fff5f5
- Shades (toward black): #da0105, #c10104, #ad0104, #980103, #840103, #6b0102, #560002, #420001, #290001, #140000

## Harmonies

- Complementary: #01efeb
- Analogous: #ef017c, #ef7401
- Triadic: #05ef01, #0105ef
- Split-complementary: #01ef74, #017cef
- Tetradic: #7cef01, #01efeb, #7401ef

## Colors that go with #ef0105

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 #ef0105: 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 #ef0105 — 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
- **Steel Blue** #4682b4 [harmony, pool: split] — Steel Blue is a split-complement of #ef0105: 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), Wendy's (https://brandsweets.com/colors/brands/wendys-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #ef0105 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 #ef0105, 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 #ef0105: 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 #ef0105: 18 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
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #ef0105: 6 real palettes, including Databricks's brand system and Google's brand system, as the accent. Seen in: Databricks (https://brandsweets.com/colors/brands/databricks-com), Google (https://brandsweets.com/colors/brands/google-com), Figma (https://brandsweets.com/colors/brands/figma), Replit (https://brandsweets.com/colors/brands/replit). — https://brandsweets.com/colors/dodgerblue

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

- On white (#ffffff): 4.49:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #e90105 (4.7:1); AA: background → #050505 (4.54:1); AAA: text → #b20104 (7.24:1)
- On black (#000000): 4.68:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #fe6264 (7.15:1)

## Brands using this color

- **Vercel** — danger #ee0000 (Δ 0.256) — https://brandsweets.com/colors/brands/vercel
- **native Cybersecurity** — secondary #ec0000 (Δ 0.643) — https://brandsweets.com/colors/brands/crowdstrike-com
- **Twitch** — accent #eb0400 (Δ 0.813) — https://brandsweets.com/colors/brands/twitch-tv
- **Tinder** — secondary #ec180e (Δ 0.827) — https://brandsweets.com/colors/brands/tinder-com
- **Wired** — secondary #eb0000 (Δ 0.845) — https://brandsweets.com/colors/brands/wired-com
- **Databricks** — secondary #eb1600 (Δ 0.965) — https://brandsweets.com/colors/brands/databricks-com
- **Doordash** — secondary #eb1700 (Δ 0.997) — https://brandsweets.com/colors/brands/doordash-com
- **Gatorade** — secondary #ea0000 (Δ 1.048) — https://brandsweets.com/colors/brands/gatorade-com
- **LG** — secondary #ea1917 (Δ 1.106) — https://brandsweets.com/colors/brands/lg-com
- **Mattel** — secondary #ee0024 (Δ 1.43) — https://brandsweets.com/colors/brands/mattel-com
- **Pizza Hut** — secondary #e91c24 (Δ 1.624) — https://brandsweets.com/colors/brands/pizzahut-com
- **Vodafone** — primary #e60000 (Δ 1.866) — https://brandsweets.com/colors/brands/vodafone-com
- **Vodafone** — accent #e60000 (Δ 1.866) — https://brandsweets.com/colors/brands/vodafone-com
- **Nintendo** — secondary #e60012 (Δ 1.895) — https://brandsweets.com/colors/brands/nintendo-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/ef0105-c4a09c-62cb96-2d251f-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: "#ef0105" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.