# #c51b2f

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

## Values

- Hex: `#c51b2f`
- RGB: rgb(197, 27, 47)
- HSL: hsl(353, 76%, 44%)
- OKLCH: oklch(0.529 0.2 22.8)
- Relative luminance: 0.1286
- Nearest named color: Active Volcano (#bb1133, Δ 2.554) — https://brandsweets.com/colors/active-volcano
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/c51b2f

## Tints & shades

- Tints (toward white): #dc1e34, #e33549, #e74b5e, #ea6676, #ed7d8a, #f0939e, #f4aeb6, #f7c5cb, #fbe0e3, #fef6f7
- Shades (toward black): #b4182b, #a21626, #901422, #7e111e, #6c0f1a, #5a0c15, #480a11, #36070d, #240509, #120204

## Harmonies

- Complementary: #1bc5b2
- Analogous: #c51b84, #c55c1b
- Triadic: #2fc51b, #1b2fc5
- Split-complementary: #1bc55c, #1b84c5
- Tetradic: #84c51b, #1bc5b2, #5c1bc5

## Colors that go with #c51b2f

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 #c51b2f: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: IHG (https://brandsweets.com/colors/brands/ihg-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-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 #c51b2f — 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), Behance (https://brandsweets.com/colors/brands/behance-net), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com), Chase (https://brandsweets.com/colors/brands/chase-com). — https://brandsweets.com/colors/royalblue
- **Steel Blue** #4682b4 [harmony, pool: split] — Steel Blue is a split-complement of #c51b2f: 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 #c51b2f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Redfin (https://brandsweets.com/colors/brands/redfin-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #c51b2f in 6 real palettes, including Maple and Ember, as the accent. Seen in: Maple (https://brandsweets.com/palettes/warm#maple), Ember (https://brandsweets.com/palettes/bold#ember), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), 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 #c51b2f, 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 #c51b2f: 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
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #c51b2f in 6 real palettes, including Olive Grove and Farmers Market, as the lead colour. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Farmers Market (https://brandsweets.com/palettes/warm#farmers-market), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre), BrandSweets (https://brandsweets.com/colors/brands/brandsweets). — https://brandsweets.com/colors/darkolivegreen

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

- On white (#ffffff): 5.88:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #af182a (7.03:1)
- On black (#000000): 3.57:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #e12339 (4.5:1); AA: background → #e3e3e3 (4.58:1); AAA: text → #eb6f7e (7.11:1)

## Brands using this color

- **AT&T** — accent #c70032 (Δ 1.512) — https://brandsweets.com/colors/brands/att-com
- **Nintendo** — accent #c10c32 (Δ 1.613) — https://brandsweets.com/colors/brands/nintendo-com
- **Nissan** — secondary #c3002f (Δ 1.672) — https://brandsweets.com/colors/brands/nissanusa-com
- **Huawei** — primary #cf0a2c (Δ 1.945) — https://brandsweets.com/colors/brands/huawei-com
- **New Balance** — secondary #cf0a2c (Δ 1.945) — https://brandsweets.com/colors/brands/newbalance-com
- **Wise** — accent #cb272f (Δ 1.958) — https://brandsweets.com/colors/brands/wise-com
- **Campbell's** — secondary #bf1a1e (Δ 1.995) — https://brandsweets.com/colors/brands/campbells-com

## Curated palettes containing it

- **Maple** (autumn, warm, vivid) — #c1272d, #e8730c, #f2b705, #fff8ee, #2a1a0a — The three colours a maple goes through in October, on a warm white — loud, seasonal, and readable because the type is near-black. — tool: https://brandsweets.com/palettes/new/c1272d-e8730c-f2b705-fff8ee-2a1a0a — collection: https://brandsweets.com/palettes/autumn

## 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/c51b2f-c49c9c-62cb8c-2d241f-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: "#c51b2f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.