# #c81939

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

## Values

- Hex: `#c81939`
- RGB: rgb(200, 25, 57)
- HSL: hsl(349, 78%, 44%)
- OKLCH: oklch(0.536 0.203 19.7)
- Relative luminance: 0.1327
- Nearest named color: Akari Red (#c90b42, Δ 1.586) — https://brandsweets.com/colors/akari-red
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/c81939

## Tints & shades

- Tints (toward white): #de1b3f, #e63354, #e94967, #ec657d, #ef7b91, #f292a4, #f5adba, #f8c4cd, #fbdfe4, #fef6f7
- Shades (toward black): #b61634, #a3142e, #911229, #7f1024, #6d0d1f, #5b0b1a, #490915, #36070f, #24040a, #120205

## Harmonies

- Complementary: #19c8a8
- Analogous: #c81990, #c85019
- Triadic: #39c819, #1939c8
- Split-complementary: #19c850, #1990c8
- Tetradic: #90c819, #19c8a8, #5019c8

## Colors that go with #c81939

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 #c81939: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), IHG (https://brandsweets.com/colors/brands/ihg-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Logitech (https://brandsweets.com/colors/brands/logitech-com). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #c81939 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Chase (https://brandsweets.com/colors/brands/chase-com), Behance (https://brandsweets.com/colors/brands/behance-net), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com). — https://brandsweets.com/colors/royalblue
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #c81939: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Coinbase (https://brandsweets.com/colors/brands/coinbase), Netflix (https://brandsweets.com/colors/brands/netflix), Wellness (https://brandsweets.com/palettes/warm#wellness). — https://brandsweets.com/colors/seagreen
- **Steel Blue** #4682b4 [harmony, pool: split] — Steel Blue is a split-complement of #c81939: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Honda (https://brandsweets.com/colors/brands/honda-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com), NASCAR (https://brandsweets.com/colors/brands/nascar-com), Wired (https://brandsweets.com/colors/brands/wired-com). — https://brandsweets.com/colors/steelblue
- **Teal** #008080 [harmony, pool: complementary] — Teal sits directly opposite #c81939 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Redfin (https://brandsweets.com/colors/brands/redfin-com), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #c81939 in 6 real palettes, including Maple and McDonald's's brand system, as the accent. Seen in: Maple (https://brandsweets.com/palettes/warm#maple), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Ember (https://brandsweets.com/palettes/bold#ember), Trailhead (https://brandsweets.com/palettes/warm#trailhead). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 5 real palettes, including Tim Hortons's brand system and Dunkin''s brand system put Blue beside #c81939, as the accent. Seen in: Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-com), Doordash (https://brandsweets.com/colors/brands/doordash-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #c81939: 4 real palettes, including MLB's brand system and Behance's brand system, as the accent. Seen in: MLB (https://brandsweets.com/colors/brands/mlb-com), Behance (https://brandsweets.com/colors/brands/behance-net), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), NASA (https://brandsweets.com/colors/brands/nasa-gov). — https://brandsweets.com/colors/cobalt

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

- On white (#ffffff): 5.75:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #ac1531 (7.23:1)
- On black (#000000): 3.65:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #e31c41 (4.51:1); AA: background → #e6e6e6 (4.6:1); AAA: text → #ed6e85 (7.17:1)

## Brands using this color

- **AT&T** — accent #c70032 (Δ 1.332) — https://brandsweets.com/colors/brands/att-com
- **Huawei** — primary #cf0a2c (Δ 1.802) — https://brandsweets.com/colors/brands/huawei-com
- **New Balance** — secondary #cf0a2c (Δ 1.802) — https://brandsweets.com/colors/brands/newbalance-com
- **Nintendo** — accent #c10c32 (Δ 1.931) — https://brandsweets.com/colors/brands/nintendo-com
- **Nissan** — secondary #c3002f (Δ 1.977) — https://brandsweets.com/colors/brands/nissanusa-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/c81939-c49c9f-62cb85-2d231f-f1e9ee?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: "#c81939" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.