# #155bcb

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

## Values

- Hex: `#155bcb`
- RGB: rgb(21, 91, 203)
- HSL: hsl(217, 81%, 44%)
- OKLCH: oklch(0.5 0.187 260.2)
- Relative luminance: 0.1195
- Nearest named color: Denim (#1560bd, Δ 2.629) — https://brandsweets.com/colors/denim
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/155bcb

## Tints & shades

- Tints (toward white): #1865e2, #2f77e9, #4686ec, #6298ef, #79a7f1, #90b6f3, #acc8f6, #c3d8f9, #dfeafc, #f6f9fe
- Shades (toward black): #1353b9, #114aa6, #104294, #0e3a81, #0c326f, #0a295c, #08214a, #061937, #041125, #020812

## Harmonies

- Complementary: #cb8515
- Analogous: #15b6cb, #2b15cb
- Triadic: #cb155b, #5bcb15
- Split-complementary: #cb2b15, #b6cb15
- Tetradic: #cb15b6, #cb8515, #15cb2b

## Colors that go with #155bcb

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 #155bcb: softer than #000 and cool enough to feel like part of the same palette. Seen in: UEFA (https://brandsweets.com/colors/brands/uefa-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com), Campus (https://brandsweets.com/palettes/friendly#campus), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #155bcb — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Chase (https://brandsweets.com/colors/brands/chase-com), Target : Expect More. Pay Less. (https://brandsweets.com/colors/brands/target-com), Netflix (https://brandsweets.com/colors/brands/netflix), Ulta Beauty (https://brandsweets.com/colors/brands/ulta-com). — https://brandsweets.com/colors/crimson
- **Amber** #ffbf00 [pool] — Amber is paired with #155bcb in 8 real palettes, including NBA's brand system and Warner Bros.'s brand system, as the lead colour. Seen in: NBA (https://brandsweets.com/colors/brands/nba-com), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Walmart (https://brandsweets.com/colors/brands/walmart-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 15 real palettes, including Pixar's brand system and Zillow's brand system put Blue beside #155bcb, as the accent. Seen in: Pixar (https://brandsweets.com/colors/brands/pixar-com), Zillow (https://brandsweets.com/colors/brands/zillow-com), Headspace (https://brandsweets.com/colors/brands/headspace-com), Activision (https://brandsweets.com/colors/brands/activision-com). — https://brandsweets.com/colors/blue
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #155bcb: 8 real palettes, including Gopro's brand system and NBA's brand system, as the supporting colour. Seen in: Gopro (https://brandsweets.com/colors/brands/gopro-com), 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). — https://brandsweets.com/colors/cornflowerblue
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #155bcb: 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), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/deepskyblue
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #155bcb: 7 real palettes, including Coursera's brand system and Apple's brand system, as the supporting colour. Seen in: Coursera (https://brandsweets.com/colors/brands/coursera-org), Apple (https://brandsweets.com/colors/brands/apple-com), HashiCorp (https://brandsweets.com/colors/brands/hashicorp-com), ASUS (https://brandsweets.com/colors/brands/asus-com). — https://brandsweets.com/colors/dodgerblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #155bcb: 8 real palettes, including Nissan's brand system and Campbell's's brand system, as the supporting colour. Seen in: Nissan (https://brandsweets.com/colors/brands/nissanusa-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com), MLB (https://brandsweets.com/colors/brands/mlb-com), AT&T (https://brandsweets.com/colors/brands/att-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 6.19:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #1353b9 (7.08:1)
- On black (#000000): 3.39:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #2670e8 (4.57:1); AA: background → #dedede (4.6:1); AAA: text → #6298ef (7.26:1)

## Brands using this color

- **Nissan** — accent #005fcc (Δ 1.035) — https://brandsweets.com/colors/brands/nissanusa-com
- **ElevenLabs** — accent #0a59d2 (Δ 1.278) — https://brandsweets.com/colors/brands/elevenlabs-io
- **Strava** — accent #0060d0 (Δ 1.416) — https://brandsweets.com/colors/brands/strava-com
- **YouTube** — accent #065fd4 (Δ 1.653) — https://brandsweets.com/colors/brands/youtube-com
- **Gopro** — primary #0059c2 (Δ 1.727) — https://brandsweets.com/colors/brands/gopro-com
- **Coursera** — accent #0056d2 (Δ 1.865) — https://brandsweets.com/colors/brands/coursera-org
- **Philips** — secondary #0b5ed7 (Δ 1.961) — https://brandsweets.com/colors/brands/philips-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/155bcb-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: "#155bcb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.