# #ef2539

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

## Values

- Hex: `#ef2539`
- RGB: rgb(239, 37, 57)
- HSL: hsl(354, 86%, 54%)
- OKLCH: oklch(0.613 0.23 23.5)
- Relative luminance: 0.1997
- Nearest named color: Barberry (#ee1133, Δ 1.284) — https://brandsweets.com/colors/barberry
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/ef2539

## Tints & shades

- Tints (toward white): #f0384a, #f25060, #f36271, #f57a86, #f68d98, #f8a0a9, #fab8be, #fbcbd0, #fde3e5, #fef6f6
- Shades (toward black): #e81127, #d11023, #b90e1f, #a10c1b, #8a0a17, #720913, #5a070f, #42050b, #2b0307, #130103

## Harmonies

- Complementary: #25efda
- Analogous: #ef259e, #ef7625
- Triadic: #39ef25, #2539ef
- Split-complementary: #25ef76, #259eef
- Tetradic: #9eef25, #25efda, #7625ef

## Colors that go with #ef2539

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 #ef2539: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Logitech (https://brandsweets.com/colors/brands/logitech-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Audi (https://brandsweets.com/colors/brands/audi-com). — https://brandsweets.com/colors/charcoal
- **Dodger Blue** #1e90ff [harmony, pool: triadic] — Dodger Blue completes a triad with #ef2539 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. 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
- **Steel Blue** #4682b4 [harmony, pool: split] — Steel Blue is a split-complement of #ef2539: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), NASCAR (https://brandsweets.com/colors/brands/nascar-com), Wired (https://brandsweets.com/colors/brands/wired-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #ef2539 in 7 real palettes, including Wired's brand system and Google's brand system, as the accent. Seen in: Wired (https://brandsweets.com/colors/brands/wired-com), Google (https://brandsweets.com/colors/brands/google-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave). — 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 #ef2539, as the accent. Seen in: Doordash (https://brandsweets.com/colors/brands/doordash-com), native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-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 #ef2539: 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), Tide (https://brandsweets.com/colors/brands/tide-com), Behance (https://brandsweets.com/colors/brands/behance-net). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #ef2539: 19 real palettes, including ElevenLabs's brand system and Costco's brand system, as the accent. Seen in: ElevenLabs (https://brandsweets.com/colors/brands/elevenlabs-io), Costco (https://brandsweets.com/colors/brands/costco-com), Netflix (https://brandsweets.com/colors/brands/netflix), L'Oréal (https://brandsweets.com/colors/brands/loreal-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #ef2539: 6 real palettes, including Nintendo's brand system and 3M's brand system, as the accent. Seen in: Nintendo (https://brandsweets.com/colors/brands/nintendo-com), 3M (https://brandsweets.com/colors/brands/3m-com), Vodafone (https://brandsweets.com/colors/brands/vodafone-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 4.21:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #e81127 (4.62:1); AA: background → #0f0f0f (4.56:1); AAA: text → #af0d1d (7.25:1)
- On black (#000000): 4.99:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #f46775 (7.04:1)

## Brands using this color

- **Wise** — primary #f4243b (Δ 0.996) — https://brandsweets.com/colors/brands/wise-com
- **ElevenLabs** — primary #f41a2f (Δ 1.197) — https://brandsweets.com/colors/brands/elevenlabs-io
- **ElevenLabs** — secondary #f41a2f (Δ 1.197) — https://brandsweets.com/colors/brands/elevenlabs-io
- **Snyk** — secondary #ec3347 (Δ 1.593) — https://brandsweets.com/colors/brands/snyk-io

## 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/ef2539-c49d9c-62cb8e-2d241f-f1e9ee?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: "#ef2539" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.