# #343d51

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

## Values

- Hex: `#343d51`
- RGB: rgb(52, 61, 81)
- HSL: hsl(221, 22%, 26%)
- OKLCH: oklch(0.36 0.037 265.8)
- Relative luminance: 0.0466
- Nearest named color: Charcoal (#36454f, Δ 2.802) — https://brandsweets.com/colors/charcoal
- Moods: cool, muted, dark, luxury, bold
- Page: https://brandsweets.com/colors/343d51

## Tints & shades

- Tints (toward white): #424d67, #505e7c, #5f7195, #7383a5, #8996b3, #9faac1, #b4bdcf, #cdd3df, #e3e6ed, #f9f9fb
- Shades (toward black): #30384b, #2c3444, #262d3b, #222835, #1e232f, #1a1e28, #161a22, #101319, #0c0e13, #08090c

## Harmonies

- Complementary: #514834
- Analogous: #344c51, #393451
- Triadic: #51343d, #3d5134
- Split-complementary: #513934, #4c5134
- Tetradic: #51344c, #514834, #345139

## Colors that go with #343d51

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

- **Dark Olive Green** #556b2f [harmony, pool: complementary] — Dark Olive Green sits directly opposite #343d51 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Undergrowth (https://brandsweets.com/palettes/dark#undergrowth). — https://brandsweets.com/colors/darkolivegreen
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #343d51 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Asana (https://brandsweets.com/colors/brands/asana-com), Mushroom (https://brandsweets.com/palettes/neutral#mushroom), Subaru (https://brandsweets.com/colors/brands/subaru-com). — https://brandsweets.com/colors/seagreen
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #343d51's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Astro (https://brandsweets.com/colors/brands/astro-build), Beach Hut (https://brandsweets.com/palettes/light#beach-hut). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 11 real palettes, including Jeep's brand system and Alaska Airlines's brand system put Blue beside #343d51, as the accent. Seen in: Jeep (https://brandsweets.com/colors/brands/jeep-com), Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 5 real palettes, including Garden Wedding and Nursery put Blush Pink beside #343d51, as the supporting colour. Seen in: Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Nursery (https://brandsweets.com/palettes/light#nursery), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Blush (https://brandsweets.com/palettes/light#blush). — https://brandsweets.com/colors/blush-pink
- **Burlywood** #deb887 [pool] — Burlywood is paired with #343d51 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), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard), Velvet (https://brandsweets.com/palettes/luxury#velvet). — https://brandsweets.com/colors/burlywood
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #343d51: 7 real palettes, including Clean Beauty and Open House, as the lead colour. Seen in: Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Open House (https://brandsweets.com/palettes/clean#open-house), Coastal (https://brandsweets.com/palettes/cool#coastal), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine). — https://brandsweets.com/colors/cadetblue
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #343d51: 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): 10.87:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.93:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #63759c (4.56:1); AA: background → #a8a8a8 (4.57:1); AAA: text → #8996b3 (7.08:1); AAA: background → #d1d1d1 (7.12:1)

## Brands using this color

- **Tumblr** — primary #304058 (Δ 1.369) — https://brandsweets.com/colors/brands/tumblr-com
- **Blizzard** — secondary #323a48 (Δ 1.7) — https://brandsweets.com/colors/brands/blizzard-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/343d51-9ca4c4-df6b4e-211f2d-e9eff1?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: "#343d51" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.