# #003a3d

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

## Values

- Hex: `#003a3d`
- RGB: rgb(0, 58, 61)
- HSL: hsl(183, 100%, 12%)
- OKLCH: oklch(0.317 0.054 200.5)
- Relative luminance: 0.0336
- Nearest named color: Rich Black (#004040, Δ 2.06) — https://brandsweets.com/colors/rich-black
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/003a3d

## Tints & shades

- Tints (toward white): #00666b, #008d94, #00b8c2, #00dfeb, #1af4ff, #47f6ff, #70f8ff, #9efaff, #c7fcff, #f5feff
- Shades (toward black): #003538, #003033, #003033, #002c2e, #002729, #002224, #001d1f, #001d1f, #001819, #001314

## Harmonies

- Complementary: #3d0300
- Analogous: #003d22, #001c3d
- Triadic: #3d003a, #3a3d00
- Split-complementary: #3d001c, #3d2200
- Tetradic: #22003d, #3d0300, #1c3d00

## Colors that go with #003a3d

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

- **Crimson** #dc143c [harmony, pool: complementary] — Crimson sits directly opposite #003a3d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: 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), Vodafone (https://brandsweets.com/colors/brands/vodafone-com). — https://brandsweets.com/colors/crimson
- **Sea Green** #2e8b57 [harmony, pool: analogous] — Sea Green is #003a3d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Mushroom (https://brandsweets.com/palettes/neutral#mushroom), Subaru (https://brandsweets.com/colors/brands/subaru-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: split] — Sienna is a split-complement of #003a3d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Harvest (https://brandsweets.com/palettes/warm#harvest), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke). — https://brandsweets.com/colors/sienna
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #003a3d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Astro (https://brandsweets.com/colors/brands/astro-build), Plaid (https://brandsweets.com/colors/brands/plaid-com), Auth0 (https://brandsweets.com/colors/brands/auth0-com). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #003a3d in 8 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), 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 Jeep's brand system put Blue beside #003a3d, as the accent. Seen in: Instacart (https://brandsweets.com/colors/brands/instacart-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 Rain Garden and Garden Wedding put Blush Pink beside #003a3d, 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 #003a3d: 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): 12.56:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.67:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #00838a (4.61:1); AA: background → #9c9c9c (4.57:1); AAA: text → #00aab3 (7.4:1); AAA: background → #c2c2c2 (7.05:1)

## Brands using this color

- **N26** — accent #003b39 (Δ 0.91) — https://brandsweets.com/colors/brands/n26-com
- **Logitech** — accent #0d3a38 (Δ 1.074) — https://brandsweets.com/colors/brands/logitech-com

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern
- 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/003a3d-a2b9be-d4598e-1f262d-e9f1ee?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: "#003a3d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.