# #1a66ff

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

## Values

- Hex: `#1a66ff`
- RGB: rgb(26, 102, 255)
- HSL: hsl(220, 100%, 55%)
- OKLCH: oklch(0.566 0.238 262.2)
- Relative luminance: 0.1694
- Nearest named color: Bluerocratic (#1f66ff, Δ 0.225) — https://brandsweets.com/colors/bluerocratic
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/1a66ff

## Tints & shades

- Tints (toward white): #2e74ff, #4785ff, #5c92ff, #70a0ff, #8ab1ff, #9ebeff, #b3ccff, #c7daff, #e0ebff, #f5f8ff
- Shades (toward black): #0055ff, #004de6, #0044cc, #003cb3, #003399, #00297a, #002061, #001847, #000f2e, #000714

## Harmonies

- Complementary: #ffb31a
- Analogous: #1ad9ff, #401aff
- Triadic: #ff1a66, #66ff1a
- Split-complementary: #ff401a, #d9ff1a
- Tetradic: #ff1ad9, #ffb31a, #1aff40

## Colors that go with #1a66ff

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 #1a66ff: softer than #000 and cool enough to feel like part of the same palette. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Zoom (https://brandsweets.com/colors/brands/zoom-us), Disney (https://brandsweets.com/colors/brands/disney-com), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #1a66ff — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Behance (https://brandsweets.com/colors/brands/behance-net), WWE (https://brandsweets.com/colors/brands/wwe-com), Toyota (https://brandsweets.com/colors/brands/toyota-com), Chase (https://brandsweets.com/colors/brands/chase-com). — https://brandsweets.com/colors/crimson
- **Amber** #ffbf00 [pool] — Amber is paired with #1a66ff in 7 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), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 12 real palettes, including Dropbox's brand system and MongoDB's brand system put Blue beside #1a66ff, as the accent. Seen in: Dropbox (https://brandsweets.com/colors/brands/dropbox-com), MongoDB (https://brandsweets.com/colors/brands/mongodb-com), EA (https://brandsweets.com/colors/brands/ea-com), Headspace (https://brandsweets.com/colors/brands/headspace-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #1a66ff: 12 real palettes, including Behance's brand system and Nivea's brand system, as the supporting colour. Seen in: Behance (https://brandsweets.com/colors/brands/behance-net), Nivea (https://brandsweets.com/colors/brands/nivea-com), Nokia (https://brandsweets.com/colors/brands/nokia-com), Carrefour (https://brandsweets.com/colors/brands/carrefour-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #1a66ff: 6 real palettes, including Webflow's brand system and Roblox's brand system, as the accent. Seen in: Webflow (https://brandsweets.com/colors/brands/webflow-com), Roblox (https://brandsweets.com/colors/brands/roblox-com), NBA (https://brandsweets.com/colors/brands/nba-com), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/cornflowerblue
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #1a66ff: 6 real palettes, including Elastic's brand system and Calm's brand system, as the supporting colour. Seen in: Elastic (https://brandsweets.com/colors/brands/elastic-co), Calm (https://brandsweets.com/colors/brands/calm-com), Patreon (https://brandsweets.com/colors/brands/patreon-com), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #1a66ff: 15 real palettes, including Square's brand system and Chase's brand system, as the supporting colour. Seen in: Square (https://brandsweets.com/colors/brands/squareup-com), Chase (https://brandsweets.com/colors/brands/chase-com), Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com), Guinness (https://brandsweets.com/colors/brands/guinness-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 4.79:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #0049db (7.06:1)
- On black (#000000): 4.39:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #1f69ff (4.52:1); AA: background → #fafafa (4.58:1); AAA: text → #5c92ff (7.01:1)

## Brands using this color

- **Behance** — primary #1769ff (Δ 0.658) — https://brandsweets.com/colors/brands/behance-net
- **Yahoo** — accent #0f69ff (Δ 0.675) — https://brandsweets.com/colors/brands/yahoo-com
- **WWE** — accent #0166ff (Δ 0.681) — https://brandsweets.com/colors/brands/wwe-com
- **Square** — primary #006aff (Δ 0.969) — https://brandsweets.com/colors/brands/squareup-com
- **Square** — accent #006aff (Δ 0.969) — https://brandsweets.com/colors/brands/squareup-com
- **IBM** — secondary #0f62fe (Δ 1.09) — https://brandsweets.com/colors/brands/ibm-com
- **Docker** — secondary #2560ff (Δ 1.281) — https://brandsweets.com/colors/brands/docker-com
- **IBM** — accent #0062fe (Δ 1.322) — https://brandsweets.com/colors/brands/ibm-com
- **Nivea** — secondary #0f60ff (Δ 1.491) — https://brandsweets.com/colors/brands/nivea-com
- **Dropbox** — primary #0061ff (Δ 1.496) — https://brandsweets.com/colors/brands/dropbox-com
- **Dropbox** — secondary #0061fe (Δ 1.515) — https://brandsweets.com/colors/brands/dropbox-com
- **Cisco** — secondary #0a60ff (Δ 1.559) — https://brandsweets.com/colors/brands/cisco-com
- **MongoDB** — secondary #006cfa (Δ 1.574) — https://brandsweets.com/colors/brands/mongodb-com
- **Toyota** — accent #145fff (Δ 1.63) — https://brandsweets.com/colors/brands/toyota-com
- **Elastic** — accent #0d6efd (Δ 1.804) — https://brandsweets.com/colors/brands/elastic-co
- **OnePlus** — accent #2660f5 (Δ 1.994) — https://brandsweets.com/colors/brands/oneplus-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/1a66ff-9ca5c4-df694e-211f2d-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: "#1a66ff" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.