# #e21603

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

## Values

- Hex: `#e21603`
- RGB: rgb(226, 22, 3)
- HSL: hsl(5, 97%, 45%)
- OKLCH: oklch(0.579 0.23 30.1)
- Relative luminance: 0.1675
- Nearest named color: Alarm (#ec0003, Δ 1.926) — https://brandsweets.com/colors/alarm
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/e21603

## Tints & shades

- Tints (toward white): #fb1804, #fc3422, #fc4b3b, #fc6254, #fd7e72, #fd958b, #feaca5, #fec3be, #fedfdc, #fff6f5
- Shades (toward black): #ce1403, #ba1203, #a61003, #920e02, #7e0c02, #640a02, #500801, #3c0601, #280401, #140200

## Harmonies

- Complementary: #03d0e2
- Analogous: #e20360, #e28503
- Triadic: #03e216, #1603e2
- Split-complementary: #03e285, #0360e2
- Tetradic: #60e203, #03d0e2, #8503e2

## Colors that go with #e21603

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 #e21603: 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 #e21603 — 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 #e21603 — 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 #e21603: 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 #e21603 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 Doordash's brand system and native Cybersecurity's brand system put Blue beside #e21603, as the accent. Seen in: Doordash (https://brandsweets.com/colors/brands/doordash-com), native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-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 #e21603: 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), Tide (https://brandsweets.com/colors/brands/tide-com). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #e21603: 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), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Target : Expect More. Pay Less. (https://brandsweets.com/colors/brands/target-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 4.83:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #b01103 (7.17:1)
- On black (#000000): 4.35:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #e71604 (4.51:1); AA: background → #f7f7f7 (4.51:1); AAA: text → #fc6254 (7.01:1)

## Brands using this color

- **WWE** — secondary #e40707 (Δ 0.675) — https://brandsweets.com/colors/brands/wwe-com
- **Formula 1** — secondary #e10600 (Δ 0.744) — https://brandsweets.com/colors/brands/formula1-com
- **Vodafone** — primary #e60000 (Δ 0.934) — https://brandsweets.com/colors/brands/vodafone-com
- **Vodafone** — accent #e60000 (Δ 0.934) — https://brandsweets.com/colors/brands/vodafone-com
- **Netflix** — primary #e50914 (Δ 1.018) — https://brandsweets.com/colors/brands/netflix
- **Lenovo** — secondary #e1251b (Δ 1.127) — https://brandsweets.com/colors/brands/lenovo-com
- **Nintendo** — secondary #e60012 (Δ 1.212) — https://brandsweets.com/colors/brands/nintendo-com
- **Pinterest** — secondary #dd0e0e (Δ 1.293) — https://brandsweets.com/colors/brands/pinterest-com
- **Toyota** — secondary #e10a1d (Δ 1.398) — https://brandsweets.com/colors/brands/toyota-com
- **Gatorade** — secondary #ea0000 (Δ 1.547) — https://brandsweets.com/colors/brands/gatorade-com
- **Walgreens** — secondary #e62600 (Δ 1.647) — https://brandsweets.com/colors/brands/walgreens-com
- **Lay's** — accent #df2027 (Δ 1.681) — https://brandsweets.com/colors/brands/lays-com
- **Twitch** — accent #eb0400 (Δ 1.718) — https://brandsweets.com/colors/brands/twitch-tv
- **Wired** — secondary #eb0000 (Δ 1.727) — https://brandsweets.com/colors/brands/wired-com
- **MAC Cosmetics** — secondary #da1717 (Δ 1.752) — https://brandsweets.com/colors/brands/maccosmetics-com
- **McDonald's** — secondary #da291c (Δ 1.788) — https://brandsweets.com/colors/brands/mcdonalds-com
- **Codecademy** — accent #dc2626 (Δ 1.83) — https://brandsweets.com/colors/brands/codecademy-com
- **Databricks** — secondary #eb1600 (Δ 1.833) — https://brandsweets.com/colors/brands/databricks-com
- **JBL** — secondary #df2d00 (Δ 1.833) — https://brandsweets.com/colors/brands/jbl-com
- **LG** — secondary #ea1917 (Δ 1.837) — https://brandsweets.com/colors/brands/lg-com
- **Doordash** — secondary #eb1700 (Δ 1.853) — https://brandsweets.com/colors/brands/doordash-com
- **native Cybersecurity** — secondary #ec0000 (Δ 1.912) — https://brandsweets.com/colors/brands/crowdstrike-com
- **Pinterest** — primary #e40424 (Δ 1.921) — https://brandsweets.com/colors/brands/pinterest-com
- **Pinterest** — accent #e60023 (Δ 1.994) — https://brandsweets.com/colors/brands/pinterest-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/e21603-c4a49c-62cba1-2d261f-f1e9ec?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: "#e21603" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.