# #030e21

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

## Values

- Hex: `#030e21`
- RGB: rgb(3, 14, 33)
- HSL: hsl(218, 83%, 7%)
- OKLCH: oklch(0.165 0.044 257.6)
- Relative luminance: 0.0044
- Nearest named color: Mysterious Depths (#060929, Δ 2.468) — https://brandsweets.com/colors/mysterious-depths
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/030e21

## Tints & shades

- Tints (toward white): #07204b, #0b3275, #0f449f, #1355c9, #246deb, #4e89ef, #78a5f2, #a2c1f6, #ccddfa, #f6f9fe
- Shades (toward black): #030e21, #030c1c, #030c1c, #030c1c, #030c1c, #020a17, #020a17, #020a17, #020813, #020813

## Harmonies

- Complementary: #211603
- Analogous: #031d21, #070321
- Triadic: #21030e, #0e2103
- Split-complementary: #210703, #1d2103
- Tetradic: #21031d, #211603, #032107

## Colors that go with #030e21

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 #030e21: softer than #000 and cool enough to feel like part of the same palette. Seen in: Amazon (https://brandsweets.com/colors/brands/amazon-com), Asana (https://brandsweets.com/colors/brands/asana-com), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com). — https://brandsweets.com/colors/charcoal
- **Firebrick** #b22222 [harmony, pool: triadic] — Firebrick completes a triad with #030e21 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Twilio (https://brandsweets.com/colors/brands/twilio-com), Bose (https://brandsweets.com/colors/brands/bose-com), Chipotle (https://brandsweets.com/colors/brands/chipotle-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/firebrick
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #030e21 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Intel (https://brandsweets.com/colors/brands/intel-com), Kia (https://brandsweets.com/colors/brands/kia-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Coinbase (https://brandsweets.com/colors/brands/coinbase). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #030e21 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
- **Slate Blue** #6a5acd [harmony, pool: analogous] — Slate Blue is #030e21's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Sentry (https://brandsweets.com/colors/brands/sentry-io), Linear (https://brandsweets.com/colors/brands/linear), Calm (https://brandsweets.com/colors/brands/calm-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/slateblue
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #030e21's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Olympics (https://brandsweets.com/colors/brands/olympics-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), American Express (https://brandsweets.com/colors/brands/americanexpress-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #030e21 in 17 real palettes, including Southwest Airlines's brand system and Lemon Squeezy's brand system, as the accent. Seen in: Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 19 real palettes, including Kia's brand system and League of Legends's brand system put Blue beside #030e21, as the accent. Seen in: Kia (https://brandsweets.com/colors/brands/kia-com), League of Legends (https://brandsweets.com/colors/brands/leagueoflegends-com), MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Monzo (https://brandsweets.com/colors/brands/monzo-com). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 19.29:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.09:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2870eb (4.61:1); AA: background → #7d7d7d (4.69:1); AAA: text → #6095f0 (7.05:1); AAA: background → #9c9c9c (7.03:1)

## Brands using this color

- **Twilio** — text #000d25 (Δ 1.169) — https://brandsweets.com/colors/brands/twilio-com
- **Southwest Airlines** — primary #090f23 (Δ 1.341) — https://brandsweets.com/colors/brands/southwest-com
- **Southwest Airlines** — text #090f23 (Δ 1.341) — https://brandsweets.com/colors/brands/southwest-com
- **Intel** — text #000f28 (Δ 1.504) — https://brandsweets.com/colors/brands/intel-com
- **Audible** — text #010e19 (Δ 1.827) — https://brandsweets.com/colors/brands/audible-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/030e21-9ca6c4-df644e-201f2d-e9f0f1?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: "#030e21" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.