# #f05151

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

## Values

- Hex: `#f05151`
- RGB: rgb(240, 81, 81)
- HSL: hsl(0, 84%, 63%)
- OKLCH: oklch(0.653 0.195 24.3)
- Relative luminance: 0.25
- Nearest named color: Amour (#ee5851, Δ 1.196) — https://brandsweets.com/colors/amour
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/f05151

## Tints & shades

- Tints (toward white): #f26464, #f37272, #f48585, #f69393, #f7a6a6, #f8b4b4, #fac7c7, #fbd5d5, #fde8e8, #fef6f6
- Shades (toward black): #ed3535, #eb1919, #d31212, #b71010, #a00e0e, #830b0b, #670909, #4b0707, #2f0404, #130202

## Harmonies

- Complementary: #51f0f0
- Analogous: #f051a1, #f0a151
- Triadic: #51f051, #5151f0
- Split-complementary: #51f0a1, #51a1f0
- Tetradic: #a1f051, #51f0f0, #a151f0

## Colors that go with #f05151

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 #f05151 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), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #f05151: 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), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Harbour (https://brandsweets.com/palettes/cool#harbour). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #f05151 in 8 real palettes, including Google's brand system and Ember, as the accent. Seen in: Google (https://brandsweets.com/colors/brands/google-com), Ember (https://brandsweets.com/palettes/bold#ember), Heatwave (https://brandsweets.com/palettes/warm#heatwave), Wired (https://brandsweets.com/colors/brands/wired-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 9 real palettes, including Monzo's brand system and Glossier's brand system put Blue beside #f05151, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Glossier (https://brandsweets.com/colors/brands/glossier-com), Doordash (https://brandsweets.com/colors/brands/doordash-com), Readymag (https://brandsweets.com/colors/brands/readymag-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #f05151: 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 #f05151: 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), ElevenLabs (https://brandsweets.com/colors/brands/elevenlabs-io). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #f05151: 7 real palettes, including Google's brand system and Figma's brand system, as the lead colour. Seen in: Google (https://brandsweets.com/colors/brands/google-com), Figma (https://brandsweets.com/colors/brands/figma), Databricks (https://brandsweets.com/colors/brands/databricks-com), Replit (https://brandsweets.com/colors/brands/replit). — https://brandsweets.com/colors/dodgerblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #f05151: 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), Nintendo (https://brandsweets.com/colors/brands/nintendo-com), Wendy's (https://brandsweets.com/colors/brands/wendys-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 → #eb1414 (4.52:1); AA: background → #212121 (4.6:1); AAA: text → #b21010 (7.06:1)
- On black (#000000): 6:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #f26969 (7:1)

## Brands using this color

- **Roblox** — accent #e75750 (Δ 1.804) — https://brandsweets.com/colors/brands/roblox-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/f05151-c4a19c-62cb98-2d251f-f1e9ed?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: "#f05151" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.