# #183521

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

## Values

- Hex: `#183521`
- RGB: rgb(24, 53, 33)
- HSL: hsl(139, 38%, 15%)
- OKLCH: oklch(0.3 0.051 152.3)
- Relative luminance: 0.0285
- Nearest named color: Pitch-Black Forests (#003322, Δ 2.152) — https://brandsweets.com/colors/pitch-black-forests
- Moods: dark, luxury, bold
- Page: https://brandsweets.com/colors/183521

## Tints & shades

- Tints (toward white): #245132, #337146, #3f8d58, #4ca969, #68bb82, #84c899, #a0d4b1, #bce1c8, #dcefe2, #f8fcf9
- Shades (toward black): #16311f, #152e1d, #132a1a, #112718, #102316, #0d1c12, #0b190f, #09150d, #08120b, #060e09

## Harmonies

- Complementary: #35182c
- Analogous: #1d3518, #18352f
- Triadic: #211835, #352118
- Split-complementary: #2f1835, #35181d
- Tetradic: #181d35, #35182c, #352f18

## Colors that go with #183521

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 #183521 — 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), Loom (https://brandsweets.com/colors/brands/loom-com), Rotten Tomatoes (https://brandsweets.com/colors/brands/rottentomatoes-com), Chevrolet (https://brandsweets.com/colors/brands/chevrolet-com). — https://brandsweets.com/colors/royalblue
- **Rust** #b7410e [harmony, pool: triadic] — Rust completes a triad with #183521 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Harvest (https://brandsweets.com/palettes/warm#harvest), Trailhead (https://brandsweets.com/palettes/warm#trailhead), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre), IHG (https://brandsweets.com/colors/brands/ihg-com). — https://brandsweets.com/colors/rust
- **Teal** #008080 [harmony, pool: analogous] — Teal is #183521's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: N26 (https://brandsweets.com/colors/brands/n26-com), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Alpine (https://brandsweets.com/palettes/cool#alpine), Saffron (https://brandsweets.com/palettes/warm#saffron). — https://brandsweets.com/colors/teal
- **Medium Violet Red** #c71585 [harmony, pool: complementary] — Medium Violet Red sits directly opposite #183521 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: T-Mobile (https://brandsweets.com/colors/brands/t-mobile-com). — https://brandsweets.com/colors/mediumvioletred
- **Amber** #ffbf00 [pool] — Amber is paired with #183521 in 9 real palettes, including McDonald's's brand system and Beach Hut, as the lead colour. Seen in: McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 14 real palettes, including Instacart's brand system and Headspace's brand system put Blue beside #183521, as the accent. Seen in: Instacart (https://brandsweets.com/colors/brands/instacart-com), Headspace (https://brandsweets.com/colors/brands/headspace-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Readymag (https://brandsweets.com/colors/brands/readymag-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 5 real palettes, including Rain Garden and Garden Wedding put Blush Pink beside #183521, as the accent. Seen in: Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Blush (https://brandsweets.com/palettes/light#blush), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono). — https://brandsweets.com/colors/blush-pink
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #183521: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 13.38:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.57:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #3c8653 (4.73:1); AA: background → #969696 (4.52:1); AAA: text → #4ca969 (7.19:1); AAA: background → #bdbdbd (7.12:1)

## Brands using this color

- **WhatsApp** — secondary #103928 (Δ 1.5) — https://brandsweets.com/colors/brands/whatsapp-com
- **Retool** — secondary #0e352c (Δ 1.948) — https://brandsweets.com/colors/brands/retool-com

## Fonts for this mood

- 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/183521-a2beae-c059d4-1f2d2a-ebf1e9?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: "#183521" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.