# #e10909

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

## Values

- Hex: `#e10909`
- RGB: rgb(225, 9, 9)
- HSL: hsl(0, 92%, 46%)
- OKLCH: oklch(0.573 0.232 28.9)
- Relative luminance: 0.1622
- Nearest named color: Alarm (#ec0003, Δ 2.168) — https://brandsweets.com/colors/alarm
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/e10909

## Tints & shades

- Tints (toward white): #f50f0f, #f62828, #f74545, #f85d5d, #f97676, #fa8e8e, #fba7a7, #fdc4c4, #fedddd, #fff5f5
- Shades (toward black): #ce0909, #ba0808, #a20707, #8e0606, #7a0505, #670404, #530303, #3b0202, #270202, #140101

## Harmonies

- Complementary: #09e1e1
- Analogous: #e10975, #e17509
- Triadic: #09e109, #0909e1
- Split-complementary: #09e175, #0975e1
- Tetradic: #75e109, #09e1e1, #7509e1

## Colors that go with #e10909

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 #e10909: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), IHG (https://brandsweets.com/colors/brands/ihg-com), Logitech (https://brandsweets.com/colors/brands/logitech-com). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #e10909 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: WWE (https://brandsweets.com/colors/brands/wwe-com), Toyota (https://brandsweets.com/colors/brands/toyota-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Vercel (https://brandsweets.com/colors/brands/vercel). — https://brandsweets.com/colors/royalblue
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #e10909 — 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), Coinbase (https://brandsweets.com/colors/brands/coinbase), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), 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 #e10909: 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), Honda (https://brandsweets.com/colors/brands/honda-com). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #e10909 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), Maple (https://brandsweets.com/palettes/warm#maple). — 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 #e10909, as the accent. Seen in: native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-com), Doordash (https://brandsweets.com/colors/brands/doordash-com), Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Gap (https://brandsweets.com/colors/brands/gap-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #e10909: 5 real palettes, including Walgreens's brand system and Behance's brand system, as the accent. Seen in: Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Behance (https://brandsweets.com/colors/brands/behance-net), NASA (https://brandsweets.com/colors/brands/nasa-gov), MLB (https://brandsweets.com/colors/brands/mlb-com). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #e10909: 18 real palettes, including Netflix's brand system and McDonald's's brand system, as the accent. Seen in: Netflix (https://brandsweets.com/colors/brands/netflix), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Target : Expect More. Pay Less. (https://brandsweets.com/colors/brands/target-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 4.95:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #b00707 (7.29:1)
- On black (#000000): 4.24:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #eb0a0a (4.58:1); AA: background → #f5f5f5 (4.54:1); AAA: text → #f96767 (7.16:1)

## Brands using this color

- **Formula 1** — secondary #e10600 (Δ 0.255) — https://brandsweets.com/colors/brands/formula1-com
- **WWE** — secondary #e40707 (Δ 0.596) — https://brandsweets.com/colors/brands/wwe-com
- **Pinterest** — secondary #dd0e0e (Δ 0.779) — https://brandsweets.com/colors/brands/pinterest-com
- **Toyota** — secondary #e10a1d (Δ 0.897) — https://brandsweets.com/colors/brands/toyota-com
- **Netflix** — primary #e50914 (Δ 0.927) — https://brandsweets.com/colors/brands/netflix
- **Vodafone** — primary #e60000 (Δ 0.966) — https://brandsweets.com/colors/brands/vodafone-com
- **Vodafone** — accent #e60000 (Δ 0.966) — https://brandsweets.com/colors/brands/vodafone-com
- **Nintendo** — secondary #e60012 (Δ 1.055) — https://brandsweets.com/colors/brands/nintendo-com
- **MAC Cosmetics** — secondary #da1717 (Δ 1.371) — https://brandsweets.com/colors/brands/maccosmetics-com
- **Budweiser** — primary #dc041c (Δ 1.424) — https://brandsweets.com/colors/brands/budweiser-com
- **Pinterest** — primary #e40424 (Δ 1.558) — https://brandsweets.com/colors/brands/pinterest-com
- **Lenovo** — secondary #e1251b (Δ 1.592) — https://brandsweets.com/colors/brands/lenovo-com
- **Lay's** — accent #df2027 (Δ 1.609) — https://brandsweets.com/colors/brands/lays-com
- **Pinterest** — accent #e60023 (Δ 1.71) — https://brandsweets.com/colors/brands/pinterest-com
- **Gatorade** — secondary #ea0000 (Δ 1.765) — https://brandsweets.com/colors/brands/gatorade-com
- **Codecademy** — accent #dc2626 (Δ 1.857) — https://brandsweets.com/colors/brands/codecademy-com
- **Wired** — secondary #eb0000 (Δ 1.967) — https://brandsweets.com/colors/brands/wired-com
- **McDonald's** — secondary #da291c (Δ 1.977) — https://brandsweets.com/colors/brands/mcdonalds-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/e10909-c4a19c-62cb98-2d251f-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: "#e10909" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.