# #104bcb

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

## Values

- Hex: `#104bcb`
- RGB: rgb(16, 75, 203)
- HSL: hsl(221, 85%, 43%)
- OKLCH: oklch(0.468 0.206 262.8)
- Relative luminance: 0.0945
- Nearest named color: Cobalt Blue (#0047ab, Δ 5.328) — https://brandsweets.com/colors/cobalt
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/104bcb

## Tints & shades

- Tints (toward white): #1356e7, #2665ed, #4279f0, #5a8af2, #769ef4, #8eaff6, #aac3f8, #c2d4fa, #dee8fc, #f6f8fe
- Shades (toward black): #0f44b8, #0d3da5, #0c3692, #0a2f7f, #092a71, #08235e, #061c4b, #051539, #030e26, #020713

## Harmonies

- Complementary: #cb9010
- Analogous: #10a9cb, #3310cb
- Triadic: #cb104b, #4bcb10
- Split-complementary: #cb3310, #a9cb10
- Tetradic: #cb10a9, #cb9010, #10cb33

## Colors that go with #104bcb

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 #104bcb: softer than #000 and cool enough to feel like part of the same palette. Seen in: UEFA (https://brandsweets.com/colors/brands/uefa-com), HP (https://brandsweets.com/colors/brands/hp-com), Campus (https://brandsweets.com/palettes/friendly#campus), Hasbro (https://brandsweets.com/colors/brands/hasbro-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #104bcb — 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), 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). — https://brandsweets.com/colors/crimson
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #104bcb'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), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #104bcb in 6 real palettes, including Walmart's brand system and Warner Bros.'s brand system, as the accent. Seen in: Walmart (https://brandsweets.com/colors/brands/walmart-com), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), NBA (https://brandsweets.com/colors/brands/nba-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 7 real palettes, including Zillow's brand system and Procter & Gamble's brand system put Blue beside #104bcb, as the lead colour. Seen in: Zillow (https://brandsweets.com/colors/brands/zillow-com), Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Headspace (https://brandsweets.com/colors/brands/headspace-com). — https://brandsweets.com/colors/blue
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #104bcb: 9 real palettes, including Gopro's brand system and Blue Mono, as the supporting colour. Seen in: Gopro (https://brandsweets.com/colors/brands/gopro-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com). — https://brandsweets.com/colors/cornflowerblue
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #104bcb: 5 real palettes, including Warp's brand system and Venmo's brand system, as the lead colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Venmo (https://brandsweets.com/colors/brands/venmo-com), Kraken (https://brandsweets.com/colors/brands/kraken-com), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/deepskyblue
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #104bcb: 11 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), OnePlus (https://brandsweets.com/colors/brands/oneplus-com). — https://brandsweets.com/colors/dodgerblue

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

- On white (#ffffff): 7.26:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.89:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2f6cee (4.5:1); AA: background → #cccccc (4.52:1); AAA: text → #6894f3 (7.12:1); AAA: background → #fcfcfc (7.08:1)

## Brands using this color

- **Soundcloud** — accent #044dd2 (Δ 1.202) — https://brandsweets.com/colors/brands/soundcloud-com
- **MLB** — accent #0048c7 (Δ 1.217) — https://brandsweets.com/colors/brands/mlb-com
- **Purina Pro Plan** — accent #1c49c4 (Δ 1.27) — https://brandsweets.com/colors/brands/chewy-com
- **Warbyparker** — accent #1050d0 (Δ 1.419) — https://brandsweets.com/colors/brands/warbyparker-com
- **Intel** — primary #0046c8 (Δ 1.507) — https://brandsweets.com/colors/brands/intel-com
- **UEFA** — accent #1e4fd0 (Δ 1.592) — https://brandsweets.com/colors/brands/uefa-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/104bcb-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: "#104bcb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.