# #040023

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

## Values

- Hex: `#040023`
- RGB: rgb(4, 0, 35)
- HSL: hsl(247, 100%, 7%)
- OKLCH: oklch(0.123 0.076 277.2)
- Relative luminance: 0.0015
- Nearest named color: Midnight (#03012d, Δ 2.389) — https://brandsweets.com/colors/midnight
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/040023

## Tints & shades

- Tints (toward white): #0a0052, #0f0080, #1400ad, #1a00db, #2b0fff, #543dff, #7c6bff, #a599ff, #cdc7ff, #f6f5ff
- Shades (toward black): #040024, #04001f, #04001f, #04001f, #04001f, #030019, #030019, #030019, #020014, #020014

## Harmonies

- Complementary: #202400
- Analogous: #000e24, #160024
- Triadic: #240400, #002404
- Split-complementary: #241600, #0e2400
- Tetradic: #24000e, #202400, #002416

## Colors that go with #040023

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

- **Blue Violet** #8a2be2 [harmony, pool: analogous] — Blue Violet is #040023's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Circuit (https://brandsweets.com/palettes/technical#circuit), Twitch (https://brandsweets.com/colors/brands/twitch-tv), Render (https://brandsweets.com/colors/brands/render-com). — https://brandsweets.com/colors/blueviolet
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #040023: softer than #000 and cool enough to feel like part of the same palette. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Amazon (https://brandsweets.com/colors/brands/amazon-com), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com). — https://brandsweets.com/colors/charcoal
- **Rust** #b7410e [harmony, pool: triadic] — Rust completes a triad with #040023 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Noir Beauty (https://brandsweets.com/palettes/dark#noir-beauty), Semrush (https://brandsweets.com/colors/brands/semrush-com), Wayfair (https://brandsweets.com/colors/brands/wayfair-com), Garnet (https://brandsweets.com/palettes/warm#garnet). — https://brandsweets.com/colors/rust
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #040023 — 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), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com), Coinbase (https://brandsweets.com/colors/brands/coinbase), Kia (https://brandsweets.com/colors/brands/kia-com). — https://brandsweets.com/colors/seagreen
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #040023'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 #040023 in 10 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] — 14 real palettes, including Penpot's brand system and Glossier's brand system put Blue beside #040023, as the supporting colour. Seen in: Penpot (https://brandsweets.com/colors/brands/penpot-app), Glossier (https://brandsweets.com/colors/brands/glossier-com), Uber (https://brandsweets.com/colors/brands/uber-com), League of Legends (https://brandsweets.com/colors/brands/leagueoflegends-com). — https://brandsweets.com/colors/blue
- **Champagne** #f7e7ce [pool] — 5 real palettes, including Midnight Luxe and Allbirds's brand system put Champagne beside #040023, as the text colour against it. Seen in: Midnight Luxe (https://brandsweets.com/palettes/luxury#midnight-luxe), Allbirds (https://brandsweets.com/colors/brands/allbirds-com), Sweetgreen (https://brandsweets.com/colors/brands/sweetgreen-com), Bramble (https://brandsweets.com/palettes/muted#bramble). — https://brandsweets.com/colors/champagne

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

- On white (#ffffff): 20.4:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.03:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #6f5cff (4.65:1); AA: background → #787878 (4.62:1); AAA: text → #9385ff (7.04:1); AAA: background → #999999 (7.16:1)

## 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/040023-a59cc4-dfaa4e-271f2d-e9ecf1?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: "#040023" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.