# #02151d

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

## Values

- Hex: `#02151d`
- RGB: rgb(2, 21, 29)
- HSL: hsl(198, 87%, 6%)
- OKLCH: oklch(0.183 0.031 226.5)
- Relative luminance: 0.0064
- Nearest named color: Midnight Edition (#0c121b, Δ 1.776) — https://brandsweets.com/colors/midnight-edition
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/02151d

## Tints & shades

- Tints (toward white): #053448, #085272, #0b75a2, #0e94cd, #1aafef, #45bef2, #70cdf5, #a0def8, #cbedfb, #f5fcfe
- Shades (toward black): #02151d, #02151d, #021118, #021118, #021118, #021118, #021118, #010e13, #010e13, #010e13

## Harmonies

- Complementary: #1d0a02
- Analogous: #021d17, #02071d
- Triadic: #1d0215, #151d02
- Split-complementary: #1d0207, #1d1702
- Tetradic: #17021d, #1d0a02, #071d02

## Colors that go with #02151d

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 #02151d: softer than #000 and cool enough to feel like part of the same palette. Seen in: Amazon (https://brandsweets.com/colors/brands/amazon-com), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #02151d: 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), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com), Behance (https://brandsweets.com/colors/brands/behance-net), Budweiser (https://brandsweets.com/colors/brands/budweiser-com). — https://brandsweets.com/colors/crimson
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #02151d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Chase (https://brandsweets.com/colors/brands/chase-com), Bose (https://brandsweets.com/colors/brands/bose-com), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com). — https://brandsweets.com/colors/royalblue
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #02151d 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 #02151d'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), Redfin (https://brandsweets.com/colors/brands/redfin-com), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Clinic (https://brandsweets.com/palettes/clean#clinic). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #02151d in 18 real palettes, including Lemon Squeezy's brand system and Southwest Airlines's brand system, as the lead colour. Seen in: Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), 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] — 21 real palettes, including Kia's brand system and MongoDB's brand system put Blue beside #02151d, as the accent. Seen in: Kia (https://brandsweets.com/colors/brands/kia-com), MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Monzo (https://brandsweets.com/colors/brands/monzo-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 #02151d 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), Neobank (https://brandsweets.com/palettes/vivid#neobank). — https://brandsweets.com/colors/blueviolet

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

- On white (#ffffff): 18.62:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.13:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0c7fb0 (4.68:1); AA: background → #7d7d7d (4.52:1); AAA: text → #10a2e0 (7.27:1); AAA: background → #a1a1a1 (7.21:1)

## Brands using this color

- **Kia** — primary #05141f (Δ 0.809) — https://brandsweets.com/colors/brands/kia-com
- **Kia** — text #05141f (Δ 0.809) — https://brandsweets.com/colors/brands/kia-com
- **MongoDB** — text #061621 (Δ 1.156) — https://brandsweets.com/colors/brands/mongodb-com
- **Monzo** — text #091723 (Δ 1.857) — https://brandsweets.com/colors/brands/monzo-com
- **Perplexity** — text #091717 (Δ 1.97) — https://brandsweets.com/colors/brands/perplexity

## 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/02151d-9cb3c4-df4e69-1f232d-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: "#02151d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.