# #3d4271

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

## Values

- Hex: `#3d4271`
- RGB: rgb(61, 66, 113)
- HSL: hsl(234, 30%, 34%)
- OKLCH: oklch(0.398 0.079 277.5)
- Relative luminance: 0.0608
- Nearest named color: Blue Funk (#2d4470, Δ 2.236) — https://brandsweets.com/colors/blue-funk
- Moods: cool, muted
- Page: https://brandsweets.com/colors/3d4271

## Tints & shades

- Tints (toward white): #474e85, #545b9c, #636aab, #7a81b8, #8e93c2, #a2a6cd, #b9bdda, #cdd0e4, #e4e6f1, #f8f9fb
- Shades (toward black): #373c67, #32365d, #2d3053, #272b49, #22253f, #1d1f35, #17192b, #121321, #0c0e17, #07080d

## Harmonies

- Complementary: #716c3d
- Analogous: #3d5c71, #513d71
- Triadic: #713d42, #42713d
- Split-complementary: #71513d, #5c713d
- Tetradic: #713d5c, #716c3d, #3d7151

## Colors that go with #3d4271

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #3d4271's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Glacier (https://brandsweets.com/palettes/cool#glacier), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 7 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #3d4271, as the accent. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Jeep (https://brandsweets.com/colors/brands/jeep-com). — https://brandsweets.com/colors/blue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #3d4271: 4 real palettes, including Dusk and Desert Road, as the accent. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Desert Road (https://brandsweets.com/palettes/warm#desert-road), Notion (https://brandsweets.com/colors/brands/notion), Bramble (https://brandsweets.com/palettes/muted#bramble). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #3d4271 in 9 real palettes, including Codecademy's brand system and Marvel's brand system, as the accent. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #3d4271: 15 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com), HP (https://brandsweets.com/colors/brands/hp-com). — https://brandsweets.com/colors/denim
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #3d4271 in 4 real palettes, including Sapphire & Gold and Disney's brand system, as the supporting colour. Seen in: Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Disney (https://brandsweets.com/colors/brands/disney-com), Open House (https://brandsweets.com/palettes/clean#open-house), Fireside (https://brandsweets.com/palettes/dark#fireside). — https://brandsweets.com/colors/goldenrod
- **Midnight Blue** #191970 [pool] — 14 real palettes, including Microsoft's brand system and First Snow put Midnight Blue beside #3d4271, as the accent. Seen in: Microsoft (https://brandsweets.com/colors/brands/microsoft-com), First Snow (https://brandsweets.com/palettes/cool#first-snow), Plaid (https://brandsweets.com/colors/brands/plaid-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/midnightblue
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #3d4271: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 9.48:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.22:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #6a71af (4.59:1); AA: background → #b3b3b3 (4.52:1); AAA: text → #8e93c2 (7.1:1); AAA: background → #dedede (7.04:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/3d4271-9d9cc4-df8a4e-241f2d-e9eef1?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: "#3d4271" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.