# #ef5439

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

## Values

- Hex: `#ef5439`
- RGB: rgb(239, 84, 57)
- HSL: hsl(9, 85%, 58%)
- OKLCH: oklch(0.652 0.196 32.2)
- Relative luminance: 0.2499
- Nearest named color: Angry Flamingo (#f04e45, Δ 1.782) — https://brandsweets.com/colors/angry-flamingo
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/ef5439

## Tints & shades

- Tints (toward white): #f0644c, #f2755f, #f48571, #f59584, #f7a697, #f8b6aa, #fac6bd, #fbd6d0, #fde7e3, #fef7f6
- Shades (toward black): #ed4021, #de3112, #c62b10, #aa250e, #92200c, #7b1b0a, #5e1508, #470f06, #2a0903, #130402

## Harmonies

- Complementary: #39d4ef
- Analogous: #ef3979, #efaf39
- Triadic: #39ef54, #5439ef
- Split-complementary: #39efaf, #3979ef
- Tetradic: #79ef39, #39d4ef, #af39ef

## Colors that go with #ef5439

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Cadet Blue** #5f9ea0 [harmony, pool: complementary] — Cadet Blue sits directly opposite #ef5439 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), Diner (https://brandsweets.com/palettes/vivid#diner), Dusk (https://brandsweets.com/palettes/cool#dusk), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty). — https://brandsweets.com/colors/cadetblue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #ef5439: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Tumblr (https://brandsweets.com/colors/brands/tumblr-com), HubSpot (https://brandsweets.com/colors/brands/hubspot-com), Audi (https://brandsweets.com/colors/brands/audi-com), Harbour (https://brandsweets.com/palettes/cool#harbour). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #ef5439 in 8 real palettes, including Ember and Google's brand system, as the accent. Seen in: Ember (https://brandsweets.com/palettes/bold#ember), Google (https://brandsweets.com/colors/brands/google-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave), Maple (https://brandsweets.com/palettes/warm#maple). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 8 real palettes, including Monzo's brand system and Glossier's brand system put Blue beside #ef5439, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Glossier (https://brandsweets.com/colors/brands/glossier-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Doordash (https://brandsweets.com/colors/brands/doordash-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #ef5439: 5 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), Cobalt Pop (https://brandsweets.com/palettes/bold#cobalt-pop). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #ef5439: 15 real palettes, including PlanetScale's brand system and Postman's brand system, as the accent. Seen in: PlanetScale (https://brandsweets.com/colors/brands/planetscale-com), Postman (https://brandsweets.com/colors/brands/postman-com), Strava (https://brandsweets.com/colors/brands/strava-com), Soundcloud (https://brandsweets.com/colors/brands/soundcloud-com). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #ef5439: 8 real palettes, including Figma's brand system and Replit's brand system, as the accent. Seen in: Figma (https://brandsweets.com/colors/brands/figma), Replit (https://brandsweets.com/colors/brands/replit), Google (https://brandsweets.com/colors/brands/google-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave). — https://brandsweets.com/colors/dodgerblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #ef5439: 8 real palettes, including Ember and 3M's brand system, as the supporting colour. Seen in: Ember (https://brandsweets.com/palettes/bold#ember), 3M (https://brandsweets.com/colors/brands/3m-com), Maple (https://brandsweets.com/palettes/warm#maple), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 3.5:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #de3112 (4.61:1); AA: background → #212121 (4.6:1); AAA: text → #aa250e (7.05:1)
- On black (#000000): 6:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #f16d55 (7.06:1)

## Brands using this color

- **Figma** — primary #f24e1e (Δ 1.794) — https://brandsweets.com/colors/brands/figma
- **Figma** — logoRed #f24e1e (Δ 1.794) — https://brandsweets.com/colors/brands/figma

## 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/ef5439-c4a79c-62cba8-2d271f-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: "#ef5439" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.