# #1b64da

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

## Values

- Hex: `#1b64da`
- RGB: rgb(27, 100, 218)
- HSL: hsl(217, 78%, 48%)
- OKLCH: oklch(0.532 0.194 260.2)
- Relative luminance: 0.1441
- Nearest named color: Royal Blue (#4169e1, Δ 3.525) — https://brandsweets.com/colors/royalblue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/1b64da

## Tints & shades

- Tints (toward white): #2a71e5, #4080e7, #578fea, #6e9fed, #84aef0, #9bbdf3, #b2ccf5, #c9dbf8, #dfeafb, #f6f9fe
- Shades (toward black): #195cc8, #1651b1, #14499f, #113f88, #0f3676, #0c2e64, #0a234d, #071b3b, #041124, #020812

## Harmonies

- Complementary: #da911b
- Analogous: #1bc4da, #311bda
- Triadic: #da1b64, #64da1b
- Split-complementary: #da311b, #c4da1b
- Tetradic: #da1bc4, #da911b, #1bda31

## Colors that go with #1b64da

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 #1b64da: softer than #000 and cool enough to feel like part of the same palette. Seen in: 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), Disney (https://brandsweets.com/colors/brands/disney-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #1b64da — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Foot Locker (https://brandsweets.com/colors/brands/footlocker-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Chase (https://brandsweets.com/colors/brands/chase-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/crimson
- **Amber** #ffbf00 [pool] — Amber is paired with #1b64da in 9 real palettes, including NBA's brand system and Wikipedia's brand system, as the lead colour. Seen in: NBA (https://brandsweets.com/colors/brands/nba-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Walmart (https://brandsweets.com/colors/brands/walmart-com), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 15 real palettes, including Headspace's brand system and BBC's brand system put Blue beside #1b64da, as the accent. Seen in: Headspace (https://brandsweets.com/colors/brands/headspace-com), BBC (https://brandsweets.com/colors/brands/bbc-com), Pixar (https://brandsweets.com/colors/brands/pixar-com), EA (https://brandsweets.com/colors/brands/ea-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #1b64da: 14 real palettes, including Unilever's brand system and Nokia's brand system, as the lead colour. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Nokia (https://brandsweets.com/colors/brands/nokia-com), Carrefour (https://brandsweets.com/colors/brands/carrefour-com), NHL (https://brandsweets.com/colors/brands/nhl-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #1b64da: 7 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), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/cornflowerblue
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #1b64da: 7 real palettes, including Elastic's brand system and Venmo's brand system, as the supporting colour. Seen in: Elastic (https://brandsweets.com/colors/brands/elastic-co), Venmo (https://brandsweets.com/colors/brands/venmo-com), Astro (https://brandsweets.com/colors/brands/astro-build), Calm (https://brandsweets.com/colors/brands/calm-com). — https://brandsweets.com/colors/deepskyblue
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #1b64da: 8 real palettes, including HashiCorp's brand system and ASUS's brand system, as the supporting colour. Seen in: HashiCorp (https://brandsweets.com/colors/brands/hashicorp-com), ASUS (https://brandsweets.com/colors/brands/asus-com), Apple (https://brandsweets.com/colors/brands/apple-com), Coursera (https://brandsweets.com/colors/brands/coursera-org). — https://brandsweets.com/colors/dodgerblue

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

- On white (#ffffff): 5.41:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #1653b6 (7.13:1)
- On black (#000000): 3.88:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #2a71e5 (4.59:1); AA: background → #ebebeb (4.54:1); AAA: text → #6096eb (7.06:1)

## Brands using this color

- **HashiCorp** — primary #2264d6 (Δ 0.691) — https://brandsweets.com/colors/brands/hashicorp-com
- **HashiCorp** — accent #2264d6 (Δ 0.691) — https://brandsweets.com/colors/brands/hashicorp-com
- **Loom** — primary #1868db (Δ 0.985) — https://brandsweets.com/colors/brands/loom-com
- **Loom** — secondary #1868db (Δ 0.985) — https://brandsweets.com/colors/brands/loom-com
- **GitHub** — accent #0969da (Δ 1.249) — https://brandsweets.com/colors/brands/github
- **NBA** — secondary #0268d6 (Δ 1.319) — https://brandsweets.com/colors/brands/nba-com
- **Fitbit** — secondary #1967d2 (Δ 1.491) — https://brandsweets.com/colors/brands/fitbit-com
- **Box** — primary #0061d5 (Δ 1.509) — https://brandsweets.com/colors/brands/box-com
- **Box** — secondary #0061d5 (Δ 1.509) — https://brandsweets.com/colors/brands/box-com
- **Khan Academy** — accent #0069d6 (Δ 1.513) — https://brandsweets.com/colors/brands/khanacademy-org
- **Postman** — accent #0265d2 (Δ 1.519) — https://brandsweets.com/colors/brands/postman-com
- **Foot Locker** — accent #036ad8 (Δ 1.571) — https://brandsweets.com/colors/brands/footlocker-com
- **Philips** — secondary #0b5ed7 (Δ 1.804) — https://brandsweets.com/colors/brands/philips-com
- **YouTube** — accent #065fd4 (Δ 1.852) — https://brandsweets.com/colors/brands/youtube-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/1b64da-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: "#1b64da" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.