# #306ed9

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

## Values

- Hex: `#306ed9`
- RGB: rgb(48, 110, 217)
- HSL: hsl(218, 69%, 52%)
- OKLCH: oklch(0.558 0.176 260.5)
- Relative luminance: 0.1679
- Nearest named color: Royal Blue (#4169e1, Δ 2.218) — https://brandsweets.com/colors/royalblue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/306ed9

## Tints & shades

- Tints (toward white): #467ddd, #5789e0, #6c98e4, #7ea4e7, #93b4eb, #a9c3ef, #bacff2, #d0def6, #e1eaf9, #f6f9fd
- Shades (toward black): #2562cb, #2157b5, #1e4fa4, #1a458e, #163a79, #123063, #0e254e, #0b1d3c, #071327, #030811

## Harmonies

- Complementary: #d99b30
- Analogous: #30c3d9, #4730d9
- Triadic: #d9306e, #6ed930
- Split-complementary: #d94730, #c3d930
- Tetradic: #d930c3, #d99b30, #30d947

## Colors that go with #306ed9

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 #306ed9: 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 #306ed9 — 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), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/crimson
- **Amber** #ffbf00 [pool] — Amber is paired with #306ed9 in 11 real palettes, including Walmart's brand system and Wikipedia's brand system, as the accent. Seen in: Walmart (https://brandsweets.com/colors/brands/walmart-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), NBA (https://brandsweets.com/colors/brands/nba-com), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 16 real palettes, including BBC's brand system and EA's brand system put Blue beside #306ed9, as the accent. Seen in: BBC (https://brandsweets.com/colors/brands/bbc-com), EA (https://brandsweets.com/colors/brands/ea-com), Pixar (https://brandsweets.com/colors/brands/pixar-com), MongoDB (https://brandsweets.com/colors/brands/mongodb-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #306ed9: 13 real palettes, including Carrefour's brand system and Unilever's brand system, as the accent. Seen in: Carrefour (https://brandsweets.com/colors/brands/carrefour-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Intel (https://brandsweets.com/colors/brands/intel-com), Nokia (https://brandsweets.com/colors/brands/nokia-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #306ed9: 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 #306ed9: 8 real palettes, including Astro's brand system and Venmo's brand system, as the supporting colour. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Venmo (https://brandsweets.com/colors/brands/venmo-com), Elastic (https://brandsweets.com/colors/brands/elastic-co), Calm (https://brandsweets.com/colors/brands/calm-com). — https://brandsweets.com/colors/deepskyblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #306ed9: 7 real palettes, including Campbell's's brand system and Nissan's brand system, as the supporting colour. Seen in: Campbell's (https://brandsweets.com/colors/brands/campbells-com), Nissan (https://brandsweets.com/colors/brands/nissanusa-com), Honda (https://brandsweets.com/colors/brands/honda-com), AT&T (https://brandsweets.com/colors/brands/att-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 4.82:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #2055b1 (7.01:1)
- On black (#000000): 4.36:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #3471da (4.52:1); AA: background → #fafafa (4.62:1); AAA: text → #6c98e4 (7.25:1)

## Brands using this color

- **Subaru** — secondary #1971d4 (Δ 1.641) — https://brandsweets.com/colors/brands/subaru-com
- **Walmart** — secondary #0071dc (Δ 1.883) — https://brandsweets.com/colors/brands/walmart-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/306ed9-9ca6c4-df644e-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: "#306ed9" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.