# #042b3e

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

## Values

- Hex: `#042b3e`
- RGB: rgb(4, 43, 62)
- HSL: hsl(200, 88%, 13%)
- OKLCH: oklch(0.274 0.054 235.3)
- Relative luminance: 0.021
- Nearest named color: Eternal Darkness (#1c2841, Δ 2.67) — https://brandsweets.com/colors/eternal-darkness
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/042b3e

## Tints & shades

- Tints (toward white): #074969, #096390, #0c81bb, #0e9be1, #2cb0f2, #52bef4, #7ecef7, #a4ddf9, #cfedfc, #f5fbfe
- Shades (toward black): #04283a, #032435, #032130, #031e2b, #031e2b, #021a26, #021722, #02141d, #021018, #010d13

## Harmonies

- Complementary: #3e1704
- Analogous: #043e35, #040e3e
- Triadic: #3e042b, #2b3e04
- Split-complementary: #3e040e, #3e3504
- Tetradic: #35043e, #3e1704, #0e3e04

## Colors that go with #042b3e

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

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #042b3e: softer than #000 and cool enough to feel like part of the same palette. Seen in: Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Volkswagen (https://brandsweets.com/colors/brands/vw-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #042b3e: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Vodafone (https://brandsweets.com/colors/brands/vodafone-com), Svelte (https://brandsweets.com/colors/brands/svelte-dev), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), AliExpress (https://brandsweets.com/colors/brands/aliexpress-com). — https://brandsweets.com/colors/crimson
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #042b3e's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: GEICO (https://brandsweets.com/colors/brands/geico-com), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Subaru (https://brandsweets.com/colors/brands/subaru-com), GitHub (https://brandsweets.com/colors/brands/github). — https://brandsweets.com/colors/royalblue
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #042b3e 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), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Harvest (https://brandsweets.com/palettes/warm#harvest). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: analogous] — Teal is #042b3e's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), N26 (https://brandsweets.com/colors/brands/n26-com), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #042b3e in 18 real palettes, including Beach Hut and Southwest Airlines's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 23 real palettes, including Monzo's brand system and Readymag's brand system put Blue beside #042b3e, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Sketch (https://brandsweets.com/colors/brands/sketch-com), Headspace (https://brandsweets.com/colors/brands/headspace-com). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #042b3e in 6 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour. Seen in: ClickUp (https://brandsweets.com/colors/brands/clickup-com), Yahoo (https://brandsweets.com/colors/brands/yahoo-com), Prepare your taste buds... (https://brandsweets.com/colors/brands/grubhub-com), Klarna US (https://brandsweets.com/colors/brands/klarna-com). — https://brandsweets.com/colors/blueviolet

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

- On white (#ffffff): 14.79:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.42:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0c7db6 (4.62:1); AA: background → #8f8f8f (4.57:1); AAA: text → #0f9ee6 (7.05:1); AAA: background → #b3b3b3 (7.05:1)

## 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/042b3e-9cb2c4-df4e64-1f232d-e9f1f0?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: "#042b3e" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.