# #f43f2f

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

## Values

- Hex: `#f43f2f`
- RGB: rgb(244, 63, 47)
- HSL: hsl(5, 90%, 57%)
- OKLCH: oklch(0.638 0.219 29.5)
- Relative luminance: 0.2299
- Nearest named color: Angry Flamingo (#f04e45, Δ 2.334) — https://brandsweets.com/colors/angry-flamingo
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/f43f2f

## Tints & shades

- Tints (toward white): #f55142, #f66355, #f77569, #f8877c, #f99d94, #faafa8, #fbc1bb, #fcd2cf, #fde4e2, #fef6f5
- Shades (toward black): #f32916, #df1d0c, #c71a0a, #ae1709, #961408, #791006, #610d05, #490a04, #2c0602, #130301

## Harmonies

- Complementary: #2fe4f4
- Analogous: #f42f81, #f4a22f
- Triadic: #2ff43f, #3f2ff4
- Split-complementary: #2ff4a2, #2f81f4
- Tetradic: #81f42f, #2fe4f4, #a22ff4

## Colors that go with #f43f2f

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 #f43f2f: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Audi (https://brandsweets.com/colors/brands/audi-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com), HubSpot (https://brandsweets.com/colors/brands/hubspot-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember). — https://brandsweets.com/colors/charcoal
- **Steel Blue** #4682b4 [harmony, pool: split] — Steel Blue is a split-complement of #f43f2f: 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), Substack (https://brandsweets.com/colors/brands/substack-com), Launch Orange (https://brandsweets.com/palettes/bold#launch-orange), Wired (https://brandsweets.com/colors/brands/wired-com). — https://brandsweets.com/colors/steelblue
- **Cadet Blue** #5f9ea0 [harmony, pool: complementary] — Cadet Blue sits directly opposite #f43f2f 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). — https://brandsweets.com/colors/cadetblue
- **Amber** #ffbf00 [pool] — Amber is paired with #f43f2f 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] — 9 real palettes, including Glossier's brand system and Doordash's brand system put Blue beside #f43f2f, as the accent. Seen in: Glossier (https://brandsweets.com/colors/brands/glossier-com), Doordash (https://brandsweets.com/colors/brands/doordash-com), Monzo (https://brandsweets.com/colors/brands/monzo-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 #f43f2f: 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), Behance (https://brandsweets.com/colors/brands/behance-net). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #f43f2f: 15 real palettes, including ElevenLabs's brand system and L'Oréal's brand system, as the accent. Seen in: ElevenLabs (https://brandsweets.com/colors/brands/elevenlabs-io), L'Oréal (https://brandsweets.com/colors/brands/loreal-com), YouTube (https://brandsweets.com/colors/brands/youtube-com), PlanetScale (https://brandsweets.com/colors/brands/planetscale-com). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #f43f2f: 7 real palettes, including Databricks's brand system and Google's brand system, as the accent. 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

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

- On white (#ffffff): 3.75:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #e91f0c (4.5:1); AA: background → #1c1c1c (4.54:1); AAA: text → #ae1709 (7.18:1)
- On black (#000000): 5.6:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #f6675a (7.01:1)

## Brands using this color

- **NASA** — accent #f64137 (Δ 0.785) — https://brandsweets.com/colors/brands/nasa-gov
- **NASA** — secondary #fc3d21 (Δ 1.689) — https://brandsweets.com/colors/brands/nasa-gov
- **Databricks** — primary #fc341c (Δ 1.786) — https://brandsweets.com/colors/brands/databricks-com
- **Google** — secondary #ea4335 (Δ 1.864) — https://brandsweets.com/colors/brands/google-com
- **Clerk** — secondary #ef4444 (Δ 1.952) — https://brandsweets.com/colors/brands/clerk-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/f43f2f-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: "#f43f2f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.