# #540303

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

## Values

- Hex: `#540303`
- RGB: rgb(84, 3, 3)
- HSL: hsl(0, 93%, 17%)
- OKLCH: oklch(0.283 0.112 28.4)
- Relative luminance: 0.0196
- Nearest named color: Burned (#520b00, Δ 1.205) — https://brandsweets.com/colors/burned
- Moods: warm, vivid, dark, playful, bold, luxury
- Page: https://brandsweets.com/colors/540303

## Tints & shades

- Tints (toward white): #7b0404, #a20606, #ca0707, #f10909, #f83030, #f95858, #fa7f7f, #fca6a6, #fdcece, #fff5f5
- Shades (toward black): #4f0303, #450202, #400202, #3b0202, #360202, #2c0202, #270101, #220101, #190101, #140101

## Harmonies

- Complementary: #035454
- Analogous: #54032b, #542b03
- Triadic: #035403, #030354
- Split-complementary: #03542b, #032b54
- Tetradic: #2b5403, #035454, #2b0354

## Colors that go with #540303

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #540303 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Headspace (https://brandsweets.com/colors/brands/headspace-com), Chevrolet (https://brandsweets.com/colors/brands/chevrolet-com), Loom (https://brandsweets.com/colors/brands/loom-com), Zed (https://brandsweets.com/colors/brands/zed-dev). — https://brandsweets.com/colors/royalblue
- **Sienna** #a0522d [harmony, pool: analogous] — Sienna is #540303's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Harvest (https://brandsweets.com/palettes/warm#harvest), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: complementary] — Teal sits directly opposite #540303 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Saffron (https://brandsweets.com/palettes/warm#saffron), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #540303 in 5 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), Heatwave (https://brandsweets.com/palettes/warm#heatwave), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 8 real palettes, including Tim Hortons's brand system and Headspace's brand system put Blue beside #540303, as the accent. Seen in: Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Headspace (https://brandsweets.com/colors/brands/headspace-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Readymag (https://brandsweets.com/colors/brands/readymag-com). — https://brandsweets.com/colors/blue
- **Champagne** #f7e7ce [pool] — 5 real palettes, including Darkroom and Woodsmoke put Champagne beside #540303, as the surface under it. Seen in: Darkroom (https://brandsweets.com/palettes/muted#darkroom), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Allbirds (https://brandsweets.com/colors/brands/allbirds-com). — https://brandsweets.com/colors/champagne
- **Chocolate** #d2691e [pool] — Chocolate shows up next to #540303 in 4 real palettes, including Farmers Market and Wellness, as the lead colour. Seen in: Farmers Market (https://brandsweets.com/palettes/warm#farmers-market), Wellness (https://brandsweets.com/palettes/warm#wellness), Homestead (https://brandsweets.com/palettes/warm#homestead), Postman (https://brandsweets.com/colors/brands/postman-com). — https://brandsweets.com/colors/chocolate
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #540303: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Squarespace (https://brandsweets.com/colors/brands/squarespace-com), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com). — https://brandsweets.com/colors/charcoal

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

- On white (#ffffff): 15.09:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.39:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #ec0909 (4.61:1); AA: background → #8f8f8f (4.67:1); AAA: text → #f96666 (7.12:1); AAA: background → #b3b3b3 (7.2:1)

## 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
- luxury: https://brandsweets.com/fonts/mood/luxury

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/540303-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: "#540303" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.