# #212d5f

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

## Values

- Hex: `#212d5f`
- RGB: rgb(33, 45, 95)
- HSL: hsl(228, 48%, 25%)
- OKLCH: oklch(0.316 0.09 270.4)
- Relative luminance: 0.0303
- Nearest named color: Deep Sea Base (#2c2c57, Δ 2.126) — https://brandsweets.com/colors/deep-sea-base
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/212d5f

## Tints & shades

- Tints (toward white): #2a3a79, #354997, #3e55b1, #5168c2, #7082cd, #8a99d6, #a4b0df, #bfc7e8, #dde1f3, #f7f8fc
- Shades (toward black): #1e2a57, #1c264f, #192248, #171f40, #141b39, #10162d, #0d1226, #0b0f1e, #080b17, #05070f

## Harmonies

- Complementary: #5e5221
- Analogous: #214c5e, #34215e
- Triadic: #5e212d, #2d5e21
- Split-complementary: #5e3421, #4c5e21
- Tetradic: #5e214c, #5e5221, #215e34

## Colors that go with #212d5f

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

- **Dark Olive Green** #556b2f [harmony, pool: complementary] — Dark Olive Green sits directly opposite #212d5f 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), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Cohere (https://brandsweets.com/colors/brands/cohere-com). — https://brandsweets.com/colors/darkolivegreen
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #212d5f — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Mushroom (https://brandsweets.com/palettes/neutral#mushroom). — https://brandsweets.com/colors/seagreen
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #212d5f'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), Discover (https://brandsweets.com/colors/brands/discover-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Auth0 (https://brandsweets.com/colors/brands/auth0-com). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #212d5f in 6 real palettes, including Beach Hut and Southwest Airlines's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 13 real palettes, including Alaska Airlines's brand system and Sketch's brand system put Blue beside #212d5f, 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
- **Blush Pink** #e8b4b8 [pool] — 5 real palettes, including Rain Garden and Blush put Blush Pink beside #212d5f, as the accent. Seen in: Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Blush (https://brandsweets.com/palettes/light#blush), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono). — https://brandsweets.com/colors/blush-pink
- **Burlywood** #deb887 [pool] — Burlywood is paired with #212d5f in 4 real palettes, including Coastal and Polaroid, as the accent. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Polaroid (https://brandsweets.com/palettes/light#polaroid), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard), Kiln (https://brandsweets.com/palettes/dark#kiln). — https://brandsweets.com/colors/burlywood
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #212d5f: 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): 13.08:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.61:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #5d72c6 (4.69:1); AA: background → #999999 (4.59:1); AAA: text → #8293d3 (7.06:1); AAA: background → #bfbfbf (7.11:1)

## Brands using this color

- **Marvel** — secondary #223364 (Δ 1.917) — 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/212d5f-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: "#212d5f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.