# #641b21

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

## Values

- Hex: `#641b21`
- RGB: rgb(100, 27, 33)
- HSL: hsl(355, 57%, 25%)
- OKLCH: oklch(0.343 0.104 20)
- Relative luminance: 0.036
- Nearest named color: Bloodlust (#6b1c1a, Δ 1.915) — https://brandsweets.com/colors/bloodlust
- Moods: warm, dark, luxury, bold
- Page: https://brandsweets.com/colors/641b21

## Tints & shades

- Tints (toward white): #80232b, #a02c36, #bc343f, #cd4752, #d56770, #dd838a, #e59fa5, #ecbbbf, #f5dbdd, #fdf7f7
- Shades (toward black): #5c191f, #54171c, #4c1519, #441317, #3c1014, #300d10, #280b0d, #20090b, #180708, #100405

## Harmonies

- Complementary: #1b645e
- Analogous: #641b46, #643a1b
- Triadic: #21641b, #1b2164
- Split-complementary: #1b643a, #1b4664
- Tetradic: #46641b, #1b645e, #3a1b64

## Colors that go with #641b21

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

- **Teal** #008080 [harmony, pool: complementary] — Teal sits directly opposite #641b21 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). — https://brandsweets.com/colors/teal
- **Blue** #0000ff [pool] — 4 real palettes, including Tim Hortons's brand system and Dunkin''s brand system put Blue beside #641b21, as the accent. Seen in: Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Headspace (https://brandsweets.com/colors/brands/headspace-com). — https://brandsweets.com/colors/blue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #641b21: 5 real palettes, including Bramble and Chipotle's brand system, as the supporting colour. Seen in: Bramble (https://brandsweets.com/palettes/muted#bramble), Chipotle (https://brandsweets.com/colors/brands/chipotle-com), Bakery (https://brandsweets.com/palettes/warm#bakery), Notion (https://brandsweets.com/colors/brands/notion). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #641b21 in 4 real palettes, including M&M's's brand system and Burger King's brand system, as the supporting colour. Seen in: M&M's (https://brandsweets.com/colors/brands/mms-com), Burger King (https://brandsweets.com/colors/brands/bk-com), Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com). — https://brandsweets.com/colors/crimson
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #641b21: 4 real palettes, including Macaron and Nursery, as the supporting colour. Seen in: Macaron (https://brandsweets.com/palettes/light#macaron), Nursery (https://brandsweets.com/palettes/light#nursery), Stone (https://brandsweets.com/palettes/neutral#stone), Sorbet (https://brandsweets.com/palettes/light#sorbet). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #641b21 — 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), Rotten Tomatoes (https://brandsweets.com/colors/brands/rottentomatoes-com), Docker (https://brandsweets.com/colors/brands/docker-com). — https://brandsweets.com/colors/royalblue
- **Sage Green** #9caf88 [pool] — Designers have shipped Sage Green with #641b21: 7 real palettes, including Resort and Garden Wedding, as the supporting colour. Seen in: Resort (https://brandsweets.com/palettes/light#resort), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Stone (https://brandsweets.com/palettes/neutral#stone), Polaroid (https://brandsweets.com/palettes/light#polaroid). — https://brandsweets.com/colors/sage-green
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #641b21: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Squarespace (https://brandsweets.com/colors/brands/squarespace-com). — https://brandsweets.com/colors/charcoal

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

- On white (#ffffff): 12.21:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.72:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #cd4752 (4.62:1); AA: background → #9e9e9e (4.56:1); AAA: text → #db7b83 (7.17:1); AAA: background → #c7c7c7 (7.22:1)

## Fonts for this mood

- warm: https://brandsweets.com/fonts/mood/warm
- luxury: https://brandsweets.com/fonts/mood/luxury
- 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/641b21-c49e9c-62cb8f-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: "#641b21" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.