# #2b66d4

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

## Values

- Hex: `#2b66d4`
- RGB: rgb(43, 102, 212)
- HSL: hsl(219, 66%, 50%)
- OKLCH: oklch(0.536 0.181 261.4)
- Relative luminance: 0.1477
- Nearest named color: God of Rain (#4466cc, Δ 2.481) — https://brandsweets.com/colors/god-of-rain
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/2b66d4

## Tints & shades

- Tints (toward white): #4176d8, #5685dc, #6791e0, #7ca0e4, #91b0e8, #a6bfed, #bbcef1, #ccdaf5, #e1eaf9, #f7f9fd
- Shades (toward black): #275cbe, #2454ae, #1f4a98, #1c4187, #173772, #132d5d, #10254c, #0b1b37, #081226, #030811

## Harmonies

- Complementary: #d4992b
- Analogous: #2bbad4, #452bd4
- Triadic: #d42b66, #66d42b
- Split-complementary: #d4452b, #bad42b
- Tetradic: #d42bba, #d4992b, #2bd445

## Colors that go with #2b66d4

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 #2b66d4: 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
- **Amber** #ffbf00 [pool] — Amber is paired with #2b66d4 in 10 real palettes, including Wikipedia's brand system and NBA's brand system, as the accent. Seen in: Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), NBA (https://brandsweets.com/colors/brands/nba-com), 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] — 16 real palettes, including Pixar's brand system and Headspace's brand system put Blue beside #2b66d4, as the accent. Seen in: Pixar (https://brandsweets.com/colors/brands/pixar-com), Headspace (https://brandsweets.com/colors/brands/headspace-com), BBC (https://brandsweets.com/colors/brands/bbc-com), EA (https://brandsweets.com/colors/brands/ea-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #2b66d4: 13 real palettes, including Unilever's brand system and Carrefour's brand system, as the lead colour. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Carrefour (https://brandsweets.com/colors/brands/carrefour-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 #2b66d4: 7 real palettes, including NBA's brand system and Coca-Cola's brand system, as the accent. Seen in: NBA (https://brandsweets.com/colors/brands/nba-com), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Webflow (https://brandsweets.com/colors/brands/webflow-com), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #2b66d4 in 18 real palettes, including Foot Locker's brand system and Pizza Hut's brand system, as the supporting colour. Seen in: Foot Locker (https://brandsweets.com/colors/brands/footlocker-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Netflix (https://brandsweets.com/colors/brands/netflix), Ulta Beauty (https://brandsweets.com/colors/brands/ulta-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #2b66d4: 7 real palettes, including Venmo's brand system and Astro's brand system, as the supporting colour. Seen in: Venmo (https://brandsweets.com/colors/brands/venmo-com), Astro (https://brandsweets.com/colors/brands/astro-build), Elastic (https://brandsweets.com/colors/brands/elastic-co), Calm (https://brandsweets.com/colors/brands/calm-com). — https://brandsweets.com/colors/deepskyblue
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #2b66d4's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: American Express (https://brandsweets.com/colors/brands/americanexpress-com), Discover (https://brandsweets.com/colors/brands/discover-com), Telegram (https://brandsweets.com/colors/brands/telegram-org). — https://brandsweets.com/colors/steelblue

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

- On white (#ffffff): 5.31:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #2454ae (7.11:1)
- On black (#000000): 3.95:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #3c72d7 (4.58:1); AA: background → #ededed (4.54:1); AAA: text → #6f97e2 (7.2:1)

## Brands using this color

- **HashiCorp** — primary #2264d6 (Δ 0.908) — https://brandsweets.com/colors/brands/hashicorp-com
- **HashiCorp** — accent #2264d6 (Δ 0.908) — https://brandsweets.com/colors/brands/hashicorp-com
- **Fitbit** — secondary #1967d2 (Δ 1.073) — https://brandsweets.com/colors/brands/fitbit-com
- **Wikipedia** — secondary #3366cc (Δ 1.343) — https://brandsweets.com/colors/brands/wikipedia-org
- **Loom** — primary #1868db (Δ 1.416) — https://brandsweets.com/colors/brands/loom-com
- **Loom** — secondary #1868db (Δ 1.416) — https://brandsweets.com/colors/brands/loom-com
- **NBA** — secondary #0268d6 (Δ 1.625) — https://brandsweets.com/colors/brands/nba-com
- **GitHub** — accent #0969da (Δ 1.676) — https://brandsweets.com/colors/brands/github
- **Khan Academy** — accent #0069d6 (Δ 1.688) — https://brandsweets.com/colors/brands/khanacademy-org
- **Foot Locker** — accent #036ad8 (Δ 1.735) — https://brandsweets.com/colors/brands/footlocker-com
- **Postman** — accent #0265d2 (Δ 1.847) — https://brandsweets.com/colors/brands/postman-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/2b66d4-9ca5c4-df664e-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: "#2b66d4" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.