# red (#ff0000)

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

## Values

- Hex: `#ff0000`
- RGB: rgb(255, 0, 0)
- HSL: hsl(0, 100%, 50%)
- OKLCH: oklch(0.628 0.258 29.2)
- Relative luminance: 0.2126
- Name: red (`red`, source: css)
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/red

## Tints & shades

- Tints (toward white): #ff1a1a, #ff3333, #ff4747, #ff6161, #ff7a7a, #ff9494, #ffadad, #ffc2c2, #ffdbdb, #fff5f5
- Shades (toward black): #e60000, #d10000, #b80000, #a30000, #8a0000, #700000, #5c0000, #420000, #2e0000, #140000

## Harmonies

- Complementary: #00ffff
- Analogous: #ff0080, #ff8000
- Triadic: #00ff00, #0000ff
- Split-complementary: #00ff80, #0080ff
- Tetradic: #80ff00, #00ffff, #8000ff

## Colors that go with red

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 red: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Logitech (https://brandsweets.com/colors/brands/logitech-com), Audi (https://brandsweets.com/colors/brands/audi-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com), HubSpot (https://brandsweets.com/colors/brands/hubspot-com). — https://brandsweets.com/colors/charcoal
- **Dodger Blue** #1e90ff [harmony, pool: triadic] — Dodger Blue completes a triad with red — 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), Heatwave (https://brandsweets.com/palettes/warm#heatwave). — https://brandsweets.com/colors/dodgerblue
- **Steel Blue** #4682b4 [harmony, pool: split] — Steel Blue is a split-complement of red: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Wired (https://brandsweets.com/colors/brands/wired-com), NASCAR (https://brandsweets.com/colors/brands/nascar-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Substack (https://brandsweets.com/colors/brands/substack-com). — https://brandsweets.com/colors/steelblue
- **Cadet Blue** #5f9ea0 [harmony, pool: complementary] — Cadet Blue sits directly opposite red 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 red in 6 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), Heatwave (https://brandsweets.com/palettes/warm#heatwave), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 7 real palettes, including Gap's brand system and native Cybersecurity's brand system put Blue beside red, as the accent. Seen in: Gap (https://brandsweets.com/colors/brands/gap-com), native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-com), Doordash (https://brandsweets.com/colors/brands/doordash-com), Glossier (https://brandsweets.com/colors/brands/glossier-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with red: 4 real palettes, including NASA's brand system and Walgreens's brand system, as the lead colour. Seen in: NASA (https://brandsweets.com/colors/brands/nasa-gov), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), 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 red: 15 real palettes, including L'Oréal's brand system and YouTube's brand system, as the accent. Seen in: L'Oréal (https://brandsweets.com/colors/brands/loreal-com), YouTube (https://brandsweets.com/colors/brands/youtube-com), ElevenLabs (https://brandsweets.com/colors/brands/elevenlabs-io), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 4:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #eb0000 (4.63:1); AA: background → #141414 (4.61:1); AAA: text → #b30000 (7.2:1)
- On black (#000000): 5.25:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #ff6161 (7.13:1)

## Brands using this color

- **3M** — primary #ff0000 — https://brandsweets.com/colors/brands/3m-com
- **Gap** — secondary #ff0000 — https://brandsweets.com/colors/brands/gap-com
- **Heineken** — accent #ff0000 — https://brandsweets.com/colors/brands/heineken-com
- **L'Oréal** — secondary #ff0000 — https://brandsweets.com/colors/brands/loreal-com
- **Logitech** — secondary #ff0000 — https://brandsweets.com/colors/brands/logitech-com
- **Paddle** — secondary #ff0000 — https://brandsweets.com/colors/brands/paddle-com
- **YouTube** — primary #ff0000 — https://brandsweets.com/colors/brands/youtube-com
- **native Cybersecurity** — primary #fc0404 (Δ 0.575) — https://brandsweets.com/colors/brands/crowdstrike-com
- **Nike** — secondary #ff0015 (Δ 0.613) — https://brandsweets.com/colors/brands/nike-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/ff0000-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: "#ff0000" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.