# #403d42

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

## Values

- Hex: `#403d42`
- RGB: rgb(64, 61, 66)
- HSL: hsl(276, 4%, 25%)
- OKLCH: oklch(0.365 0.009 312.2)
- Relative luminance: 0.0482
- Nearest named color: Black Truffle (#463d3e, Δ 1.201) — https://brandsweets.com/colors/black-truffle
- Moods: neutral, dark, luxury, bold
- Page: https://brandsweets.com/colors/403d42

## Tints & shades

- Tints (toward white): #524e55, #67626a, #79737d, #8b858e, #9f9aa2, #b1adb3, #c2bfc4, #d4d2d5, #e8e7e9, #fafafa
- Shades (toward black): #3b383d, #363338, #312f32, #2c2a2d, #272528, #1f1d20, #1a181b, #151415, #0f0f10, #0a0a0b

## Harmonies

- Complementary: #3f423d
- Analogous: #3e3d42, #423d42
- Triadic: #42403d, #3d4240
- Split-complementary: #42423d, #3d423e
- Tetradic: #423e3d, #3f423d, #3d4242

## Colors that go with #403d42

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

- **Amber** #ffbf00 [pool] — Amber is paired with #403d42 in 4 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), Trailhead (https://brandsweets.com/palettes/warm#trailhead), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 11 real palettes, including Dunkin''s brand system and Jeep's brand system put Blue beside #403d42, as the supporting colour. Seen in: Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Jeep (https://brandsweets.com/colors/brands/jeep-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Headspace (https://brandsweets.com/colors/brands/headspace-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 5 real palettes, including Nursery and Garden Wedding put Blush Pink beside #403d42, as the lead colour. Seen in: Nursery (https://brandsweets.com/palettes/light#nursery), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Blush (https://brandsweets.com/palettes/light#blush), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden). — https://brandsweets.com/colors/blush-pink
- **Burlywood** #deb887 [pool] — Burlywood is paired with #403d42 in 5 real palettes, including Polaroid and Coastal, as the accent. Seen in: Polaroid (https://brandsweets.com/palettes/light#polaroid), Coastal (https://brandsweets.com/palettes/cool#coastal), Velvet (https://brandsweets.com/palettes/luxury#velvet), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard). — https://brandsweets.com/colors/burlywood
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #403d42: 6 real palettes, including Clean Beauty and Paper & Pine, as the lead colour. Seen in: Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), Coastal (https://brandsweets.com/palettes/cool#coastal), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/cadetblue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #403d42: 9 real palettes, including Notion's brand system and Clean Beauty. Seen in: Notion (https://brandsweets.com/colors/brands/notion), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Bakery (https://brandsweets.com/palettes/warm#bakery), Bramble (https://brandsweets.com/palettes/muted#bramble). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #403d42 in 13 real palettes, including Dunkin''s brand system and Codecademy's brand system, as the accent. Seen in: Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/crimson
- **White Smoke** #f5f5f5 [role] — White Smoke is the near-white surface #403d42 was made for — maximum legibility with no colour cast to argue with. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 10.69:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.96:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #79737d (4.56:1); AA: background → #ababab (4.66:1); AAA: text → #9a959d (7.16:1); AAA: background → #d1d1d1 (7:1)

## Curated palettes containing it

- **Stone** (neutral, cool, minimal, clean) — #44403c, #a8a29e, #d6d3d1, #fafaf9, #1c1917 — Stone greys with a faint warmth — Tailwind's stone scale used as a whole palette: interfaces that want to disappear. — tool: https://brandsweets.com/palettes/new/44403c-a8a29e-d6d3d1-fafaf9-1c1917 — collection: https://brandsweets.com/palettes/neutral

## Fonts for this mood

- neutral: https://brandsweets.com/fonts/mood/neutral
- 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/403d42-a2beb0-c859d4-1f2d2b-eaf1e9?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: "#403d42" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.