# #3173dd

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

## Values

- Hex: `#3173dd`
- RGB: rgb(49, 115, 221)
- HSL: hsl(217, 72%, 53%)
- OKLCH: oklch(0.571 0.176 259.6)
- Relative luminance: 0.1813
- Nearest named color: Royal Blue (#4169e1, Δ 2.744) — https://brandsweets.com/colors/royalblue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/3173dd

## Tints & shades

- Tints (toward white): #4782e1, #588ee4, #6e9de7, #80a9ea, #96b8ee, #a7c3f1, #bdd2f4, #cfdef7, #e5edfb, #f6f9fe
- Shades (toward black): #2266d3, #1f5bbd, #1b51a7, #184691, #153e7f, #113369, #0e2853, #0a1e3d, #061327, #030812

## Harmonies

- Complementary: #dd9b31
- Analogous: #31c9dd, #4531dd
- Triadic: #dd3173, #73dd31
- Split-complementary: #dd4531, #c9dd31
- Tetradic: #dd31c9, #dd9b31, #31dd45

## Colors that go with #3173dd

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 #3173dd: softer than #000 and cool enough to feel like part of the same palette. Seen in: Disney (https://brandsweets.com/colors/brands/disney-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #3173dd — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com), NASCAR (https://brandsweets.com/colors/brands/nascar-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com). — https://brandsweets.com/colors/crimson
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #3173dd on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Notion (https://brandsweets.com/colors/brands/notion). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #3173dd in 11 real palettes, including Walmart's brand system and NBA's brand system, as the accent. Seen in: Walmart (https://brandsweets.com/colors/brands/walmart-com), NBA (https://brandsweets.com/colors/brands/nba-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 14 real palettes, including BBC's brand system and EA's brand system put Blue beside #3173dd, as the accent. Seen in: BBC (https://brandsweets.com/colors/brands/bbc-com), EA (https://brandsweets.com/colors/brands/ea-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Penpot (https://brandsweets.com/colors/brands/penpot-app). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #3173dd: 13 real palettes, including Carrefour's brand system and Intel's brand system, as the accent. Seen in: Carrefour (https://brandsweets.com/colors/brands/carrefour-com), Intel (https://brandsweets.com/colors/brands/intel-com), General Mills (https://brandsweets.com/colors/brands/generalmills-com), Unilever (https://brandsweets.com/colors/brands/unilever-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #3173dd: 6 real palettes, including NBA's brand system and Webflow's brand system, as the accent. Seen in: NBA (https://brandsweets.com/colors/brands/nba-com), Webflow (https://brandsweets.com/colors/brands/webflow-com), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Roblox (https://brandsweets.com/colors/brands/roblox-com). — https://brandsweets.com/colors/cornflowerblue
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #3173dd: 8 real palettes, including Astro's brand system and Patreon's brand system, as the supporting colour. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Patreon (https://brandsweets.com/colors/brands/patreon-com), Elastic (https://brandsweets.com/colors/brands/elastic-co), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 4.54:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #1d55af (7.07:1)
- On black (#000000): 4.63:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #6597e6 (7.12:1)

## Brands using this color

- **Motorola** — secondary #0e77da (Δ 1.84) — https://brandsweets.com/colors/brands/motorola-com

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- 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/3173dd-9ca7c4-df624e-201f2d-e9f0f1?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: "#3173dd" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.