# #1f3261

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

## Values

- Hex: `#1f3261`
- RGB: rgb(31, 50, 97)
- HSL: hsl(223, 52%, 25%)
- OKLCH: oklch(0.328 0.087 265.4)
- Relative luminance: 0.0344
- Nearest named color: Atlantic Navy (#13336f, Δ 2.628) — https://brandsweets.com/colors/atlantic-navy
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/1f3261

## Tints & shades

- Tints (toward white): #273f7c, #314f9b, #3a5db6, #4d6fc7, #6c88d0, #879ed9, #a2b4e2, #bdcaea, #dce3f4, #f7f9fd
- Shades (toward black): #1c2d59, #1a2951, #17264a, #152242, #121e3a, #0f182f, #0c1427, #0a101f, #070c17, #050810

## Harmonies

- Complementary: #614e1f
- Analogous: #1f5361, #2d1f61
- Triadic: #611f31, #31611f
- Split-complementary: #612d1f, #53611f
- Tetradic: #611f53, #614e1f, #1f612d

## Colors that go with #1f3261

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 #1f3261 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), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal), 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 #1f3261 — 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 #1f3261'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), Auth0 (https://brandsweets.com/colors/brands/auth0-com), Discover (https://brandsweets.com/colors/brands/discover-com), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #1f3261 in 4 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] — 12 real palettes, including Alaska Airlines's brand system and Monzo's brand system put Blue beside #1f3261, as the accent. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Sketch (https://brandsweets.com/colors/brands/sketch-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 Garden Wedding put Blush Pink beside #1f3261, as the accent. Seen in: Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Blush (https://brandsweets.com/palettes/light#blush), Nursery (https://brandsweets.com/palettes/light#nursery). — https://brandsweets.com/colors/blush-pink
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #1f3261: 8 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
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #1f3261: 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): 12.45:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.69:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #5172c8 (4.59:1); AA: background → #9c9c9c (4.53:1); AAA: text → #7b95d5 (7.1:1); AAA: background → #c4c4c4 (7.14:1)

## Brands using this color

- **Marvel** — secondary #223364 (Δ 0.732) — https://brandsweets.com/colors/brands/marvel-com
- **Confluent** — primary #143464 (Δ 1.236) — https://brandsweets.com/colors/brands/confluent-io
- **Panasonic** — secondary #0f315f (Δ 1.756) — https://brandsweets.com/colors/brands/panasonic-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/1f3261-9ca3c4-df704e-211f2d-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: "#1f3261" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.