# #04181f

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

## Values

- Hex: `#04181f`
- RGB: rgb(4, 24, 31)
- HSL: hsl(196, 77%, 7%)
- OKLCH: oklch(0.196 0.03 223.1)
- Relative luminance: 0.0078
- Nearest named color: Black Stallion (#0e191c, Δ 1.589) — https://brandsweets.com/colors/black-stallion
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/04181f

## Tints & shades

- Tints (toward white): #093748, #0f5771, #147699, #1995c2, #2bb2e3, #53c1e9, #7cd0ee, #a5def3, #cdedf9, #f6fcfe
- Shades (toward black): #041820, #04151b, #04151b, #04151b, #04151b, #031117, #031117, #031117, #020e12, #020e12

## Harmonies

- Complementary: #200b04
- Analogous: #042019, #040b20
- Triadic: #200418, #182004
- Split-complementary: #20040b, #201904
- Tetradic: #190420, #200b04, #0b2004

## Colors that go with #04181f

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 #04181f: softer than #000 and cool enough to feel like part of the same palette. Seen in: Vimeo (https://brandsweets.com/colors/brands/vimeo-com), Asana (https://brandsweets.com/colors/brands/asana-com), Sweetgreen (https://brandsweets.com/colors/brands/sweetgreen-com), Amazon (https://brandsweets.com/colors/brands/amazon-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #04181f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Chase (https://brandsweets.com/colors/brands/chase-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com), Huawei (https://brandsweets.com/colors/brands/huawei-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [harmony, pool: analogous] — Denim is #04181f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Chase (https://brandsweets.com/colors/brands/chase-com), Philips (https://brandsweets.com/colors/brands/philips-com), Peacock (https://brandsweets.com/palettes/vivid#peacock), LEGO (https://brandsweets.com/colors/brands/lego-com). — https://brandsweets.com/colors/denim
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #04181f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Oatly (https://brandsweets.com/colors/brands/oatly-com), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: analogous] — Teal is #04181f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Perplexity (https://brandsweets.com/colors/brands/perplexity), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Clinic (https://brandsweets.com/palettes/clean#clinic), Redfin (https://brandsweets.com/colors/brands/redfin-com). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #04181f in 18 real palettes, including Lemon Squeezy's brand system and Blueprint, as the lead colour. Seen in: Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 22 real palettes, including MongoDB's brand system and Monzo's brand system put Blue beside #04181f, as the accent. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Kia (https://brandsweets.com/colors/brands/kia-com), League of Legends (https://brandsweets.com/colors/brands/leagueoflegends-com). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #04181f in 10 real palettes, including Prepare your taste buds...'s brand system and Klarna US's brand system, as the accent. Seen in: Prepare your taste buds... (https://brandsweets.com/colors/brands/grubhub-com), Klarna US (https://brandsweets.com/colors/brands/klarna-com), Taco Bell (https://brandsweets.com/colors/brands/tacobell-com), Yahoo (https://brandsweets.com/colors/brands/yahoo-com). — https://brandsweets.com/colors/blueviolet

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

- On white (#ffffff): 18.17:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.16:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1680a7 (4.68:1); AA: background → #808080 (4.6:1); AAA: text → #1ca3d4 (7.24:1); AAA: background → #a1a1a1 (7.03:1)

## Brands using this color

- **MongoDB** — text #061621 (Δ 1) — https://brandsweets.com/colors/brands/mongodb-com
- **Monzo** — text #091723 (Δ 1.251) — https://brandsweets.com/colors/brands/monzo-com
- **Kia** — primary #05141f (Δ 1.556) — https://brandsweets.com/colors/brands/kia-com
- **Kia** — text #05141f (Δ 1.556) — https://brandsweets.com/colors/brands/kia-com
- **Perplexity** — text #091717 (Δ 1.614) — https://brandsweets.com/colors/brands/perplexity
- **Affirm** — text #101820 (Δ 1.745) — https://brandsweets.com/colors/brands/affirm-com
- **Chase** — text #101820 (Δ 1.745) — https://brandsweets.com/colors/brands/chase-com
- **Character** — primary #11181c (Δ 1.9) — https://brandsweets.com/colors/brands/character-ai
- **Character** — text #11181c (Δ 1.9) — https://brandsweets.com/colors/brands/character-ai

## 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/04181f-9cb5c4-df4e6e-1f232d-e9f1ef?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: "#04181f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.