# #1d4d91

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

## Values

- Hex: `#1d4d91`
- RGB: rgb(29, 77, 145)
- HSL: hsl(215, 67%, 34%)
- OKLCH: oklch(0.427 0.124 257.9)
- Relative luminance: 0.0761
- Nearest named color: Cascade Twilight (#234893, Δ 1.473) — https://brandsweets.com/colors/cascade-twilight
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/1d4d91

## Tints & shades

- Tints (toward white): #225baa, #286ac8, #377ad7, #558edd, #6e9fe2, #88b0e7, #a6c3ed, #bfd4f2, #dde8f8, #f6f9fd
- Shades (toward black): #1a4684, #183f77, #15396a, #13325e, #102b51, #0d2444, #0b1d37, #08172b, #06101e, #030911

## Harmonies

- Complementary: #91601d
- Analogous: #1d8791, #261d91
- Triadic: #911d4d, #4d911d
- Split-complementary: #91261d, #87911d
- Tetradic: #911d87, #91601d, #1d9126

## Colors that go with #1d4d91

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 #1d4d91: softer than #000 and cool enough to feel like part of the same palette. Seen in: Amazon (https://brandsweets.com/colors/brands/amazon-com), Harbour (https://brandsweets.com/palettes/cool#harbour), Hasbro (https://brandsweets.com/colors/brands/hasbro-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #1d4d91 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Costco (https://brandsweets.com/colors/brands/costco-com), Target : Expect More. Pay Less. (https://brandsweets.com/colors/brands/target-com), Chase (https://brandsweets.com/colors/brands/chase-com). — https://brandsweets.com/colors/crimson
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #1d4d91's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier), American Express (https://brandsweets.com/colors/brands/americanexpress-com), Capital One (https://brandsweets.com/colors/brands/capitalone-com). — https://brandsweets.com/colors/steelblue
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #1d4d91 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Dyson (https://brandsweets.com/colors/brands/dyson-com). — https://brandsweets.com/colors/sienna
- **Amber** #ffbf00 [pool] — Amber is paired with #1d4d91 in 4 real palettes, including McDonald's's brand system and Warner Bros.'s brand system, as the lead colour. Seen in: McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 7 real palettes, including CVS's brand system and Tesco's brand system put Blue beside #1d4d91, as the supporting colour. Seen in: CVS (https://brandsweets.com/colors/brands/cvs-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com). — https://brandsweets.com/colors/blue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #1d4d91: 6 real palettes, including MLB's brand system and Campbell's's brand system, as the supporting colour. Seen in: MLB (https://brandsweets.com/colors/brands/mlb-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com), Nissan (https://brandsweets.com/colors/brands/nissanusa-com), AT&T (https://brandsweets.com/colors/brands/att-com). — https://brandsweets.com/colors/firebrick
- **Midnight Blue** #191970 [pool] — 19 real palettes, including First Snow and Fintech Trust put Midnight Blue beside #1d4d91, as that palette's text colour. Seen in: First Snow (https://brandsweets.com/palettes/cool#first-snow), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Panasonic (https://brandsweets.com/colors/brands/panasonic-com), Microsoft (https://brandsweets.com/colors/brands/microsoft-com). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 8.32:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.52:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2e74d6 (4.59:1); AA: background → #bfbfbf (4.53:1); AAA: text → #6699e1 (7.21:1); AAA: background → #ededed (7.11:1)

## Brands using this color

- **CVS** — accent #004d99 (Δ 1.799) — https://brandsweets.com/colors/brands/cvs-com
- **Unilever** — secondary #004d99 (Δ 1.799) — https://brandsweets.com/colors/brands/unilever-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/1d4d91-9ca8c4-df5d4e-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: "#1d4d91" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.