# #1b57fe

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

## Values

- Hex: `#1b57fe`
- RGB: rgb(27, 87, 254)
- HSL: hsl(224, 99%, 55%)
- OKLCH: oklch(0.539 0.254 264.1)
- Relative luminance: 0.1421
- Nearest named color: Blue Ribbon (#0066ff, Δ 3.098) — https://brandsweets.com/colors/blue-ribbon
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/1b57fe

## Tints & shades

- Tints (toward white): #2f66fe, #4879fe, #5d88fe, #7197fe, #8aa9fe, #9fb8ff, #b3c7ff, #c7d6ff, #e1e9ff, #f5f8ff
- Shades (toward black): #0145fe, #013ee4, #0137cb, #0130b2, #012998, #01217a, #001a60, #001347, #000c2e, #000514

## Harmonies

- Complementary: #fec11b
- Analogous: #1bc9fe, #501bfe
- Triadic: #fe1b57, #57fe1b
- Split-complementary: #fe501b, #c9fe1b
- Tetradic: #fe1bc9, #fec11b, #1bfe50

## Colors that go with #1b57fe

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 #1b57fe: softer than #000 and cool enough to feel like part of the same palette. Seen in: Zoom (https://brandsweets.com/colors/brands/zoom-us), Docker (https://brandsweets.com/colors/brands/docker-com), Campus (https://brandsweets.com/palettes/friendly#campus), HP (https://brandsweets.com/colors/brands/hp-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #1b57fe — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Toyota (https://brandsweets.com/colors/brands/toyota-com), Chase (https://brandsweets.com/colors/brands/chase-com), WWE (https://brandsweets.com/colors/brands/wwe-com). — https://brandsweets.com/colors/crimson
- **Amber** #ffbf00 [pool] — Amber is paired with #1b57fe 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] — 9 real palettes, including Dropbox's brand system and Headspace's brand system put Blue beside #1b57fe, as the accent. Seen in: Dropbox (https://brandsweets.com/colors/brands/dropbox-com), Headspace (https://brandsweets.com/colors/brands/headspace-com), Signal (https://brandsweets.com/colors/brands/signal-org), MongoDB (https://brandsweets.com/colors/brands/mongodb-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #1b57fe: 13 real palettes, including Nokia's brand system and Nivea's brand system, as the lead colour. Seen in: Nokia (https://brandsweets.com/colors/brands/nokia-com), Nivea (https://brandsweets.com/colors/brands/nivea-com), NHL (https://brandsweets.com/colors/brands/nhl-com), Behance (https://brandsweets.com/colors/brands/behance-net). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #1b57fe: 9 real palettes, including Roblox's brand system and Webflow's brand system, as the supporting colour. Seen in: Roblox (https://brandsweets.com/colors/brands/roblox-com), Webflow (https://brandsweets.com/colors/brands/webflow-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 #1b57fe: 4 real palettes, including Elastic's brand system and Warp's brand system, as the supporting colour. Seen in: Elastic (https://brandsweets.com/colors/brands/elastic-co), Warp (https://brandsweets.com/colors/brands/warp-dev), Calm (https://brandsweets.com/colors/brands/calm-com), Patreon (https://brandsweets.com/colors/brands/patreon-com). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #1b57fe: 14 real palettes, including Chase's brand system and Square's brand system, as the lead colour. Seen in: Chase (https://brandsweets.com/colors/brands/chase-com), Square (https://brandsweets.com/colors/brands/squareup-com), Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com), Dairy Queen (https://brandsweets.com/colors/brands/dairyqueen-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 5.47:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #0140ef (7.04:1)
- On black (#000000): 3.84:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #346afe (4.64:1); AA: background → #ebebeb (4.59:1); AAA: text → #6c93fe (7.24:1)

## Brands using this color

- **Nokia** — accent #005aff (Δ 0.88) — https://brandsweets.com/colors/brands/nokia-com
- **Bose** — secondary #005bff (Δ 0.984) — https://brandsweets.com/colors/brands/bose-com
- **Zoom** — primary #0b5cff (Δ 1.037) — https://brandsweets.com/colors/brands/zoom-us
- **Zoom** — secondary #0b5cff (Δ 1.037) — https://brandsweets.com/colors/brands/zoom-us
- **Framer** — primary #0055ff (Δ 1.055) — https://brandsweets.com/colors/brands/framer
- **Spectrum** — accent #005eff (Δ 1.455) — https://brandsweets.com/colors/brands/spectrum-com
- **Grafana Labs** — primary #1b55f5 (Δ 1.463) — https://brandsweets.com/colors/brands/grafana-com
- **Grafana Labs** — accent #1b55f5 (Δ 1.463) — https://brandsweets.com/colors/brands/grafana-com
- **Coinbase** — primary #0052ff (Δ 1.517) — https://brandsweets.com/colors/brands/coinbase
- **Toyota** — accent #145fff (Δ 1.635) — https://brandsweets.com/colors/brands/toyota-com
- **Cisco** — secondary #0a60ff (Δ 1.823) — https://brandsweets.com/colors/brands/cisco-com
- **Nivea** — secondary #0f60ff (Δ 1.829) — https://brandsweets.com/colors/brands/nivea-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/1b57fe-9ca2c4-df724e-221f2d-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: "#1b57fe" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.