# #156df9

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

## Values

- Hex: `#156df9`
- RGB: rgb(21, 109, 249)
- HSL: hsl(217, 95%, 53%)
- OKLCH: oklch(0.574 0.224 260.4)
- Relative luminance: 0.1794
- Nearest named color: Bluerocratic (#1f66ff, Δ 1.812) — https://brandsweets.com/colors/bluerocratic
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/156df9

## Tints & shades

- Tints (toward white): #2e7cfa, #4289fa, #5b98fb, #6fa5fb, #88b4fc, #9cc1fc, #b4d0fd, #c8ddfe, #e1ecfe, #f5f9ff
- Shades (toward black): #065fef, #0555d6, #054bbd, #0441a4, #043a90, #033077, #02265e, #021c46, #01122d, #010814

## Harmonies

- Complementary: #f9a215
- Analogous: #15def9, #3015f9
- Triadic: #f9156d, #6df915
- Split-complementary: #f93015, #def915
- Tetradic: #f915de, #f9a215, #15f930

## Colors that go with #156df9

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 #156df9: 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 #156df9 — 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
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #156df9 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Notion (https://brandsweets.com/colors/brands/notion). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #156df9 in 9 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] — 14 real palettes, including MongoDB's brand system and EA's brand system put Blue beside #156df9, as the accent. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), EA (https://brandsweets.com/colors/brands/ea-com), BBC (https://brandsweets.com/colors/brands/bbc-com), Penpot (https://brandsweets.com/colors/brands/penpot-app). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #156df9: 13 real palettes, including Behance's brand system and Nokia's brand system, as the supporting colour. Seen in: Behance (https://brandsweets.com/colors/brands/behance-net), Nokia (https://brandsweets.com/colors/brands/nokia-com), Carrefour (https://brandsweets.com/colors/brands/carrefour-com), Nivea (https://brandsweets.com/colors/brands/nivea-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #156df9: 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 #156df9: 8 real palettes, including Elastic's brand system and Patreon's brand system, as the supporting colour. Seen in: Elastic (https://brandsweets.com/colors/brands/elastic-co), Patreon (https://brandsweets.com/colors/brands/patreon-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Calm (https://brandsweets.com/colors/brands/calm-com). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 4.58:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #054fc7 (7.12:1)
- On black (#000000): 4.59:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #5695fb (7.09:1)

## Brands using this color

- **MongoDB** — secondary #006cfa (Δ 0.61) — https://brandsweets.com/colors/brands/mongodb-com
- **Elastic** — accent #0d6efd (Δ 0.642) — https://brandsweets.com/colors/brands/elastic-co
- **Webflow** — primary #146cf4 (Δ 0.795) — https://brandsweets.com/colors/brands/webflow-com
- **Ubisoft** — accent #006ef5 (Δ 0.808) — https://brandsweets.com/colors/brands/ubisoft-com
- **EA** — accent #0070f3 (Δ 1.225) — https://brandsweets.com/colors/brands/ea-com
- **Vercel** — accent #0070f3 (Δ 1.225) — https://brandsweets.com/colors/brands/vercel
- **Behance** — primary #1769ff (Δ 1.291) — https://brandsweets.com/colors/brands/behance-net
- **Square** — primary #006aff (Δ 1.294) — https://brandsweets.com/colors/brands/squareup-com
- **Square** — accent #006aff (Δ 1.294) — https://brandsweets.com/colors/brands/squareup-com
- **GEICO** — secondary #026df1 (Δ 1.33) — https://brandsweets.com/colors/brands/geico-com
- **Yahoo** — accent #0f69ff (Δ 1.337) — https://brandsweets.com/colors/brands/yahoo-com
- **Rotten Tomatoes** — secondary #326af6 (Δ 1.546) — https://brandsweets.com/colors/brands/rottentomatoes-com
- **BBC** — secondary #0071f1 (Δ 1.599) — https://brandsweets.com/colors/brands/bbc-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/156df9-9ca7c4-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: "#156df9" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.