# #3f74ab

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

## Values

- Hex: `#3f74ab`
- RGB: rgb(63, 116, 171)
- HSL: hsl(211, 46%, 46%)
- OKLCH: oklch(0.548 0.103 251)
- Relative luminance: 0.1649
- Nearest named color: Blue Triumph (#4376ab, Δ 0.749) — https://brandsweets.com/colors/blue-triumph
- Moods: cool, modern
- Page: https://brandsweets.com/colors/3f74ab

## Tints & shades

- Tints (toward white): #4980bc, #5b8dc2, #729dcb, #84aad2, #97b7d8, #a9c3df, #bcd0e6, #d2e0ee, #e5edf5, #f8fafc
- Shades (toward black): #3a699c, #345f8d, #2d537b, #28496c, #223f5d, #1d354e, #172b3f, #111e2d, #0b141e, #060a0f

## Harmonies

- Complementary: #ab773f
- Analogous: #3fa9ab, #413fab
- Triadic: #ab3f74, #74ab3f
- Split-complementary: #ab413f, #a9ab3f
- Tetradic: #ab3fa9, #ab773f, #3fab41

## Colors that go with #3f74ab

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

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #3f74ab: softer than #000 and cool enough to feel like part of the same palette. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Amazon (https://brandsweets.com/colors/brands/amazon-com), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #3f74ab — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Intel (https://brandsweets.com/colors/brands/intel-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #3f74ab on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Dyson (https://brandsweets.com/colors/brands/dyson-com). — https://brandsweets.com/colors/sienna
- **Amber** #ffbf00 [pool] — Amber is paired with #3f74ab in 9 real palettes, including Lemon Squeezy's brand system and Wired's brand system, as the lead colour. Seen in: Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Wired (https://brandsweets.com/colors/brands/wired-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 7 real palettes, including Activision's brand system and Pixar's brand system put Blue beside #3f74ab, as the accent. Seen in: Activision (https://brandsweets.com/colors/brands/activision-com), Pixar (https://brandsweets.com/colors/brands/pixar-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Readymag (https://brandsweets.com/colors/brands/readymag-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #3f74ab: 9 real palettes, including Glacier and Fintech Trust, as the accent. Seen in: 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), General Mills (https://brandsweets.com/colors/brands/generalmills-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #3f74ab: 4 real palettes, including Coca-Cola's brand system and NBA's brand system, as the supporting colour. Seen in: Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), NBA (https://brandsweets.com/colors/brands/nba-com), Gopro (https://brandsweets.com/colors/brands/gopro-com), Webflow (https://brandsweets.com/colors/brands/webflow-com). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #3f74ab in 15 real palettes, including Retro Pop and Wendy's's brand system, as the lead colour. Seen in: Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Wendy's (https://brandsweets.com/colors/brands/wendys-com), NASCAR (https://brandsweets.com/colors/brands/nascar-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com). — https://brandsweets.com/colors/crimson

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

- On white (#ffffff): 4.89:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #325a86 (7.14:1)
- On black (#000000): 4.3:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #4279b3 (4.62:1); AA: background → #f7f7f7 (4.56:1); AAA: text → #6e9ac9 (7.13:1)

## Fonts for this mood

- 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/3f74ab-9cabc4-df534e-1f202d-e9f1f1?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: "#3f74ab" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.