# #212f69

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

## Values

- Hex: `#212f69`
- RGB: rgb(33, 47, 105)
- HSL: hsl(228, 52%, 27%)
- OKLCH: oklch(0.329 0.103 269.7)
- Relative luminance: 0.0338
- Nearest named color: Atlantic Navy (#13336f, Δ 1.881) — https://brandsweets.com/colors/atlantic-navy
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/212f69

## Tints & shades

- Tints (toward white): #2a3c84, #32489f, #3b54ba, #5168c8, #7083d2, #8b9bda, #a6b2e3, #c1c9eb, #dce1f4, #f7f8fd
- Shades (toward black): #1f2c61, #1b2755, #18234e, #162046, #141c3e, #101732, #0d132b, #0b1023, #070b17, #050710

## Harmonies

- Complementary: #695a21
- Analogous: #215369, #372169
- Triadic: #69212f, #2f6921
- Split-complementary: #693721, #536921
- Tetradic: #692153, #695a21, #216937

## Colors that go with #212f69

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

- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #212f69's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Glacier (https://brandsweets.com/palettes/cool#glacier), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Hershey's (https://brandsweets.com/colors/brands/hersheys-com). — https://brandsweets.com/colors/steelblue
- **Dark Olive Green** #556b2f [harmony, pool: complementary] — Dark Olive Green sits directly opposite #212f69 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com). — https://brandsweets.com/colors/darkolivegreen
- **Blue** #0000ff [pool] — 10 real palettes, including Alaska Airlines's brand system and Sketch's brand system put Blue beside #212f69, as the accent. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Sketch (https://brandsweets.com/colors/brands/sketch-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net). — https://brandsweets.com/colors/blue
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #212f69: 6 real palettes, including Open House and Coastal, as the supporting colour. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Coastal (https://brandsweets.com/palettes/cool#coastal), SoFi (https://brandsweets.com/colors/brands/sofi-com), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #212f69: 4 real palettes, including Purina Pro Plan's brand system and Blue Mono, as the accent. Seen in: Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), MLB (https://brandsweets.com/colors/brands/mlb-com), Unilever (https://brandsweets.com/colors/brands/unilever-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #212f69 in 11 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour. Seen in: Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #212f69: 5 real palettes, including Kraken's brand system and Lamborghini's brand system, as the accent. Seen in: Kraken (https://brandsweets.com/colors/brands/kraken-com), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Vimeo (https://brandsweets.com/colors/brands/vimeo-com), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #212f69: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 12.54:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.68:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #586fca (4.54:1); AA: background → #9c9c9c (4.57:1); AAA: text → #8394d8 (7.19:1); AAA: background → #c2c2c2 (7.04:1)

## Brands using this color

- **Casper Sleep** — accent #1e306e (Δ 0.931) — https://brandsweets.com/colors/brands/casper-com
- **Gillette** — accent #182f6e (Δ 1.339) — https://brandsweets.com/colors/brands/gillette-com
- **Marvel** — secondary #223364 (Δ 1.566) — https://brandsweets.com/colors/brands/marvel-com

## Fonts for this mood

- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold
- 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/212f69-9c9fc4-df7c4e-231f2d-e9eff1?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: "#212f69" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.