# #040ca4

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

## Values

- Hex: `#040ca4`
- RGB: rgb(4, 12, 164)
- HSL: hsl(237, 95%, 33%)
- OKLCH: oklch(0.333 0.219 264.8)
- Relative luminance: 0.0297
- Nearest named color: Bohemian Blue (#0000aa, Δ 1.229) — https://brandsweets.com/colors/bohemian-blue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/040ca4

## Tints & shades

- Tints (toward white): #050fc7, #0611e5, #1521f9, #333dfa, #565efb, #747bfb, #979cfc, #b4b8fd, #d7d9fe, #f5f6ff
- Shades (toward black): #040b95, #030a86, #030977, #030868, #02075e, #020650, #020541, #010432, #010323, #010114

## Harmonies

- Complementary: #a49c04
- Analogous: #045ca4, #4c04a4
- Triadic: #a4040c, #0ca404
- Split-complementary: #a44c04, #5ca404
- Tetradic: #a4045c, #a49c04, #04a44c

## Colors that go with #040ca4

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

- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #040ca4 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Pepsi (https://brandsweets.com/colors/brands/pepsi-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com), Behance (https://brandsweets.com/colors/brands/behance-net), Casper Sleep (https://brandsweets.com/colors/brands/casper-com). — https://brandsweets.com/colors/crimson
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #040ca4: 4 real palettes, including Tide's brand system and Purina Pro Plan's brand system, as the lead colour. Seen in: Tide (https://brandsweets.com/colors/brands/tide-com), Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Oreo (https://brandsweets.com/colors/brands/oreo-com). — https://brandsweets.com/colors/cobalt
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #040ca4 in 5 real palettes, including Nivea's brand system and Discord's brand system, as the supporting colour. Seen in: Nivea (https://brandsweets.com/colors/brands/nivea-com), Discord (https://brandsweets.com/colors/brands/discord), Nokia (https://brandsweets.com/colors/brands/nokia-com), NHL (https://brandsweets.com/colors/brands/nhl-com). — https://brandsweets.com/colors/royalblue
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #040ca4's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/steelblue
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #040ca4 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/olive
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #040ca4: softer than #000 and cool enough to feel like part of the same palette. Seen in: Boeing (https://brandsweets.com/colors/brands/boeing-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #040ca4: 3 real palettes, including Unilever's brand system and Bank of America's brand system, as the accent. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com). — https://brandsweets.com/colors/denim
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #040ca4 in 3 real palettes, including Tide's brand system and Intercom's brand system, as the accent. Seen in: Tide (https://brandsweets.com/colors/brands/tide-com), Intercom (https://brandsweets.com/colors/brands/intercom-com), NASA (https://brandsweets.com/colors/brands/nasa-gov). — https://brandsweets.com/colors/orangered

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

- On white (#ffffff): 13.18:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.59:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #5b63fb (4.62:1); AA: background → #999999 (4.62:1); AAA: text → #888dfc (7.26:1); AAA: background → #bdbdbd (7.01:1)

## Brands using this color

- **JetBlue** — accent #0000aa (Δ 1.229) — https://brandsweets.com/colors/brands/jetblue-com

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/040ca4-9f9cc4-df924e-251f2d-e9edf1?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: "#040ca4" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.