# #03178c

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

## Values

- Hex: `#03178c`
- RGB: rgb(3, 23, 140)
- HSL: hsl(231, 96%, 28%)
- OKLCH: oklch(0.311 0.186 264.8)
- Relative luminance: 0.0253
- Nearest named color: darkblue (#00008b, Δ 2.695) — https://brandsweets.com/colors/darkblue
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/03178c

## Tints & shades

- Tints (toward white): #041daf, #0423d2, #0529f5, #2343fb, #4661fb, #697ffc, #8c9dfd, #afbbfd, #d2d9fe, #f5f6ff
- Shades (toward black): #031682, #021373, #021269, #020f5a, #020d50, #010c46, #010937, #01082d, #01051e, #000314

## Harmonies

- Complementary: #8c7703
- Analogous: #035c8c, #33038c
- Triadic: #8c0317, #178c03
- Split-complementary: #8c3303, #5c8c03
- Tetradic: #8c035c, #8c7703, #038c33

## Colors that go with #03178c

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 #03178c — 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), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #03178c'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), Deep Water (https://brandsweets.com/palettes/dark#deep-water). — https://brandsweets.com/colors/steelblue
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #03178c: 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), CeraVe (https://brandsweets.com/colors/brands/cerave-com). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #03178c: 4 real palettes, including Bank of America's brand system and Panasonic's brand system, as the accent. Seen in: Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com), Panasonic (https://brandsweets.com/colors/brands/panasonic-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com). — https://brandsweets.com/colors/denim
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #03178c in 5 real palettes, including Discord's brand system and Nivea's brand system, as the lead colour. Seen in: Discord (https://brandsweets.com/colors/brands/discord), Nivea (https://brandsweets.com/colors/brands/nivea-com), Confluent (https://brandsweets.com/colors/brands/confluent-io), Nokia (https://brandsweets.com/colors/brands/nokia-com). — https://brandsweets.com/colors/royalblue
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #03178c 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
- **Blue** #0000ff [pool] — 3 real palettes, including Procter & Gamble's brand system and Pfizer's brand system put Blue beside #03178c, as the supporting colour. Seen in: Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Pfizer (https://brandsweets.com/colors/brands/pfizer-com), Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #03178c: 3 real palettes, including Purina Pro Plan's brand system and Tide's brand system, as the accent. Seen in: Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Tide (https://brandsweets.com/colors/brands/tide-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono). — https://brandsweets.com/colors/cobalt

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

- On white (#ffffff): 13.95:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.51:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #4b66fb (4.59:1); AA: background → #949494 (4.6:1); AAA: text → #7d90fc (7.27:1); AAA: background → #b8b8b8 (7.03:1)

## Brands using this color

- **Boeing** — accent #08088c (Δ 1.604) — https://brandsweets.com/colors/brands/boeing-com
- **Pepsi** — primary #0e0e96 (Δ 1.859) — https://brandsweets.com/colors/brands/pepsi-com
- **Pepsi** — accent #0e0e96 (Δ 1.859) — https://brandsweets.com/colors/brands/pepsi-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/03178c-9c9ec4-df834e-231f2d-e9eef1?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: "#03178c" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.