# #283d8a

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

## Values

- Hex: `#283d8a`
- RGB: rgb(40, 61, 138)
- HSL: hsl(227, 55%, 35%)
- OKLCH: oklch(0.39 0.131 268.2)
- Relative luminance: 0.0562
- Nearest named color: Evening Magic (#363e7d, Δ 2.863) — https://brandsweets.com/colors/evening-magic
- Moods: cool, modern
- Page: https://brandsweets.com/colors/283d8a

## Tints & shades

- Tints (toward white): #2f48a2, #3754be, #4965ca, #6179d1, #7d91d9, #94a5e0, #acb9e7, #c4cdee, #dfe4f6, #f7f8fd
- Shades (toward black): #25387e, #213373, #1e2e67, #1a285b, #17234f, #121c3f, #0f1733, #0b1228, #080c1c, #050710

## Harmonies

- Complementary: #8a7528
- Analogous: #286f8a, #44288a
- Triadic: #8a283d, #3d8a28
- Split-complementary: #8a4428, #6f8a28
- Tetradic: #8a286f, #8a7528, #288a44

## Colors that go with #283d8a

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 #283d8a: softer than #000 and cool enough to feel like part of the same palette. Seen in: dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com), Harbour (https://brandsweets.com/palettes/cool#harbour), Codecademy (https://brandsweets.com/colors/brands/codecademy-com). — https://brandsweets.com/colors/charcoal
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #283d8a'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), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 4 real palettes, including CVS's brand system and Procter & Gamble's brand system put Blue beside #283d8a, as the supporting colour. Seen in: CVS (https://brandsweets.com/colors/brands/cvs-com), Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com). — https://brandsweets.com/colors/blue
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #283d8a: 4 real palettes, including Blue Mono and Peacock's brand system, as the supporting colour. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Peacock (https://brandsweets.com/colors/brands/peacocktv-com), Gopro (https://brandsweets.com/colors/brands/gopro-com), Blizzard (https://brandsweets.com/colors/brands/blizzard-com). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #283d8a in 12 real palettes, including Walgreens's brand system and Casper Sleep's brand system, as the lead colour. Seen in: Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #283d8a: 14 real palettes, including Unilever's brand system and Warbyparker's brand system, as the accent. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com), General Mills (https://brandsweets.com/colors/brands/generalmills-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #283d8a: 4 real palettes, including Nintendo's brand system and MLB's brand system, as the accent. Seen in: Nintendo (https://brandsweets.com/colors/brands/nintendo-com), MLB (https://brandsweets.com/colors/brands/mlb-com), Datadog (https://brandsweets.com/colors/brands/datadoghq-com), 3M (https://brandsweets.com/colors/brands/3m-com). — https://brandsweets.com/colors/firebrick
- **Midnight Blue** #191970 [pool] — 17 real palettes, including Fintech Trust and First Snow put Midnight Blue beside #283d8a, as that palette's text colour. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), First Snow (https://brandsweets.com/palettes/cool#first-snow), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 9.88:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.12:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #556fce (4.55:1); AA: background → #b0b0b0 (4.56:1); AAA: text → #8194da (7.18:1); AAA: background → #d9d9d9 (7:1)

## Curated palettes containing it

- **Sapphire & Gold** (jewel-tones, luxury, cool, elegant) — #1e3a8a, #c9a227, #0e7490, #f7f6f2, #111827 — Deep sapphire and gold with a teal — old-money jewel tones on an ivory ground; heraldic without a crest. — tool: https://brandsweets.com/palettes/new/1e3a8a-c9a227-0e7490-f7f6f2-111827 — collection: https://brandsweets.com/palettes/jewel-tones

## Fonts for this mood

- 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/283d8a-9ca0c4-df7a4e-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: "#283d8a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.