# #2166fd

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

## Values

- Hex: `#2166fd`
- RGB: rgb(33, 102, 253)
- HSL: hsl(221, 98%, 56%)
- OKLCH: oklch(0.566 0.235 262.8)
- Relative luminance: 0.1692
- Nearest named color: Bluerocratic (#1f66ff, Δ 0.31) — https://brandsweets.com/colors/bluerocratic
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/2166fd

## Tints & shades

- Tints (toward white): #3574fd, #4982fd, #6294fd, #77a1fe, #8baffe, #9fbdfe, #b3cbfe, #cddcfe, #e1eaff, #f5f8ff
- Shades (toward black): #0855fd, #024be8, #0241ca, #0239b1, #023197, #01297e, #012165, #011747, #000f2d, #000714

## Harmonies

- Complementary: #fdb721
- Analogous: #21d4fd, #4921fd
- Triadic: #fd2166, #66fd21
- Split-complementary: #fd4921, #d4fd21
- Tetradic: #fd21d4, #fdb721, #21fd49

## Colors that go with #2166fd

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 #2166fd: 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 #2166fd — 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 #2166fd 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 MongoDB's brand system and Dropbox's brand system put Blue beside #2166fd, as the accent. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Dropbox (https://brandsweets.com/colors/brands/dropbox-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 #2166fd: 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 #2166fd: 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 #2166fd: 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 #2166fd: 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 → #0248de (7.04:1)
- On black (#000000): 4.38:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #266afd (4.56:1); AA: background → #fafafa (4.59:1); AAA: text → #6294fd (7.17:1)

## Brands using this color

- **Behance** — primary #1769ff (Δ 0.752) — https://brandsweets.com/colors/brands/behance-net
- **Yahoo** — accent #0f69ff (Δ 0.859) — https://brandsweets.com/colors/brands/yahoo-com
- **WWE** — accent #0166ff (Δ 1.028) — https://brandsweets.com/colors/brands/wwe-com
- **Square** — primary #006aff (Δ 1.172) — https://brandsweets.com/colors/brands/squareup-com
- **Square** — accent #006aff (Δ 1.172) — https://brandsweets.com/colors/brands/squareup-com
- **IBM** — secondary #0f62fe (Δ 1.296) — https://brandsweets.com/colors/brands/ibm-com
- **Docker** — secondary #2560ff (Δ 1.311) — https://brandsweets.com/colors/brands/docker-com
- **MongoDB** — secondary #006cfa (Δ 1.555) — https://brandsweets.com/colors/brands/mongodb-com
- **IBM** — accent #0062fe (Δ 1.564) — https://brandsweets.com/colors/brands/ibm-com
- **Nivea** — secondary #0f60ff (Δ 1.698) — https://brandsweets.com/colors/brands/nivea-com
- **Dropbox** — secondary #0061fe (Δ 1.743) — https://brandsweets.com/colors/brands/dropbox-com
- **Dropbox** — primary #0061ff (Δ 1.749) — https://brandsweets.com/colors/brands/dropbox-com
- **Cisco** — secondary #0a60ff (Δ 1.78) — https://brandsweets.com/colors/brands/cisco-com
- **OnePlus** — accent #2660f5 (Δ 1.782) — https://brandsweets.com/colors/brands/oneplus-com
- **Elastic** — accent #0d6efd (Δ 1.789) — https://brandsweets.com/colors/brands/elastic-co
- **Toyota** — accent #145fff (Δ 1.806) — https://brandsweets.com/colors/brands/toyota-com
- **Rotten Tomatoes** — secondary #326af6 (Δ 1.861) — https://brandsweets.com/colors/brands/rottentomatoes-com
- **Webflow** — primary #146cf4 (Δ 1.948) — https://brandsweets.com/colors/brands/webflow-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/2166fd-9ca4c4-df6b4e-211f2d-e9eff1?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: "#2166fd" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.