# #ef400b

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

## Values

- Hex: `#ef400b`
- RGB: rgb(239, 64, 11)
- HSL: hsl(14, 91%, 49%)
- OKLCH: oklch(0.629 0.218 34.7)
- Relative luminance: 0.2204
- Nearest named color: Arcade Fire (#ee3311, Δ 1.754) — https://brandsweets.com/colors/arcade-fire
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/ef400b

## Tints & shades

- Tints (toward white): #f4511f, #f66437, #f77750, #f88a68, #f99d80, #faac94, #fbbfac, #fcd2c5, #fde4dd, #fff7f5
- Shades (toward black): #db3b0a, #c33409, #af2f08, #972907, #842306, #6b1d05, #581804, #3f1103, #2c0c02, #130501

## Harmonies

- Complementary: #0bbaef
- Analogous: #ef0b48, #efb20b
- Triadic: #0bef40, #400bef
- Split-complementary: #0befb2, #0b48ef
- Tetradic: #48ef0b, #0bbaef, #b20bef

## Colors that go with #ef400b

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 #ef400b: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: HubSpot (https://brandsweets.com/colors/brands/hubspot-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com), Logitech (https://brandsweets.com/colors/brands/logitech-com), Audi (https://brandsweets.com/colors/brands/audi-com). — https://brandsweets.com/colors/charcoal
- **Dodger Blue** #1e90ff [harmony, pool: split] — Dodger Blue is a split-complement of #ef400b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Replit (https://brandsweets.com/colors/brands/replit), Figma (https://brandsweets.com/colors/brands/figma), Google (https://brandsweets.com/colors/brands/google-com), Databricks (https://brandsweets.com/colors/brands/databricks-com). — https://brandsweets.com/colors/dodgerblue
- **Cadet Blue** #5f9ea0 [harmony, pool: complementary] — Cadet Blue sits directly opposite #ef400b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Diner (https://brandsweets.com/palettes/vivid#diner), Alpine (https://brandsweets.com/palettes/cool#alpine), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty). — https://brandsweets.com/colors/cadetblue
- **Amber** #ffbf00 [pool] — Amber is paired with #ef400b in 7 real palettes, including Google's brand system and Heatwave, as the accent. Seen in: Google (https://brandsweets.com/colors/brands/google-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave), Ember (https://brandsweets.com/palettes/bold#ember), Wired (https://brandsweets.com/colors/brands/wired-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 8 real palettes, including Glossier's brand system and Doordash's brand system put Blue beside #ef400b, as the accent. Seen in: Glossier (https://brandsweets.com/colors/brands/glossier-com), Doordash (https://brandsweets.com/colors/brands/doordash-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #ef400b: 4 real palettes, including NASA's brand system and Tide's brand system, as the lead colour. Seen in: NASA (https://brandsweets.com/colors/brands/nasa-gov), Tide (https://brandsweets.com/colors/brands/tide-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Behance (https://brandsweets.com/colors/brands/behance-net). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #ef400b: 16 real palettes, including Postman's brand system and PlanetScale's brand system, as the accent. Seen in: Postman (https://brandsweets.com/colors/brands/postman-com), PlanetScale (https://brandsweets.com/colors/brands/planetscale-com), Strava (https://brandsweets.com/colors/brands/strava-com), L'Oréal (https://brandsweets.com/colors/brands/loreal-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #ef400b: 8 real palettes, including 3M's brand system and Ember, as the supporting colour. Seen in: 3M (https://brandsweets.com/colors/brands/3m-com), Ember (https://brandsweets.com/palettes/bold#ember), Vodafone (https://brandsweets.com/colors/brands/vodafone-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 3.88:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #db3b0a (4.52:1); AA: background → #171717 (4.62:1); AAA: text → #a12b08 (7.33:1)
- On black (#000000): 5.41:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #f66b41 (7.1:1)

## 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/ef400b-c4aa9c-62cbb1-2d291f-f1e9eb?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: "#ef400b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.