# #0a51cd

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

## Values

- Hex: `#0a51cd`
- RGB: rgb(10, 81, 205)
- HSL: hsl(218, 91%, 42%)
- OKLCH: oklch(0.48 0.203 261.4)
- Relative luminance: 0.1036
- Nearest named color: Denim (#1560bd, Δ 4.714) — https://brandsweets.com/colors/denim
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/0a51cd

## Tints & shades

- Tints (toward white): #0b5dea, #1a6af4, #377df6, #508df7, #6da0f8, #8ab3f9, #a2c3fb, #c0d6fc, #d8e6fd, #f5f9ff
- Shades (toward black): #0949b9, #0842a6, #073c97, #063484, #052c70, #04255d, #031d49, #03173a, #020f27, #010813

## Harmonies

- Complementary: #cd850a
- Analogous: #0ab3cd, #240acd
- Triadic: #cd0a51, #51cd0a
- Split-complementary: #cd240a, #b3cd0a
- Tetradic: #cd0ab3, #cd850a, #0acd24

## Colors that go with #0a51cd

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 #0a51cd: softer than #000 and cool enough to feel like part of the same palette. Seen in: UEFA (https://brandsweets.com/colors/brands/uefa-com), Campus (https://brandsweets.com/palettes/friendly#campus), HP (https://brandsweets.com/colors/brands/hp-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #0a51cd — 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), Behance (https://brandsweets.com/colors/brands/behance-net), Target : Expect More. Pay Less. (https://brandsweets.com/colors/brands/target-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/crimson
- **Amber** #ffbf00 [pool] — Amber is paired with #0a51cd 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), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 10 real palettes, including Zillow's brand system and Headspace's brand system put Blue beside #0a51cd, as the lead colour. Seen in: Zillow (https://brandsweets.com/colors/brands/zillow-com), Headspace (https://brandsweets.com/colors/brands/headspace-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Activision (https://brandsweets.com/colors/brands/activision-com). — https://brandsweets.com/colors/blue
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #0a51cd: 9 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), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono). — https://brandsweets.com/colors/cornflowerblue
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #0a51cd: 7 real palettes, including Venmo's brand system and Warp's brand system, as the supporting colour. Seen in: Venmo (https://brandsweets.com/colors/brands/venmo-com), Warp (https://brandsweets.com/colors/brands/warp-dev), Elastic (https://brandsweets.com/colors/brands/elastic-co), Calm (https://brandsweets.com/colors/brands/calm-com). — https://brandsweets.com/colors/deepskyblue
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #0a51cd: 10 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 #0a51cd: 6 real palettes, including MLB's brand system and Nissan's brand system, as the supporting colour. Seen in: MLB (https://brandsweets.com/colors/brands/mlb-com), Nissan (https://brandsweets.com/colors/brands/nissanusa-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com), 3M (https://brandsweets.com/colors/brands/3m-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 6.84:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #094fc8 (7.08:1)
- On black (#000000): 3.07:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #1f6df4 (4.55:1); AA: background → #d4d4d4 (4.61:1); AAA: text → #5e96f7 (7.18:1)

## Brands using this color

- **Warbyparker** — accent #1050d0 (Δ 0.545) — https://brandsweets.com/colors/brands/warbyparker-com
- **UEFA** — accent #1e4fd0 (Δ 1.043) — https://brandsweets.com/colors/brands/uefa-com
- **Soundcloud** — accent #044dd2 (Δ 1.229) — https://brandsweets.com/colors/brands/soundcloud-com
- **Coursera** — accent #0056d2 (Δ 1.383) — https://brandsweets.com/colors/brands/coursera-org
- **Bank of America** — accent #0053c2 (Δ 1.82) — https://brandsweets.com/colors/brands/bankofamerica-com

## Curated palettes containing it

- **Campus** (friendly, cool, clean) — #1d4ed8, #64748b, #f59e0b, #ffffff, #1e293b — Institutional blue with a highlighter-amber accent — trustworthy for parents, lively enough for students. — tool: https://brandsweets.com/palettes/new/1d4ed8-64748b-f59e0b-ffffff-1e293b — collection: https://brandsweets.com/palettes/friendly
- **Peacock** (jewel-tones, vivid, cool, bold) — #0d9488, #1d4ed8, #a21caf, #ffffff, #0c1a2b — Teal, cobalt and magenta at full chroma on white — jewel tones in daylight; the trick is a near-black text with a blue cast. — tool: https://brandsweets.com/palettes/new/0d9488-1d4ed8-a21caf-ffffff-0c1a2b — collection: https://brandsweets.com/palettes/jewel-tones

## 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/0a51cd-9ca6c4-df644e-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: "#0a51cd" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.