# #3f175e

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

## Values

- Hex: `#3f175e`
- RGB: rgb(63, 23, 94)
- HSL: hsl(274, 61%, 23%)
- OKLCH: oklch(0.306 0.121 306.2)
- Relative luminance: 0.0248
- Nearest named color: Fabric of Space (#341758, Δ 2.573) — https://brandsweets.com/colors/fabric-of-space
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/3f175e

## Tints & shades

- Tints (toward white): #551f7f, #69269c, #7f2ebd, #913ed0, #a45fd8, #b47cdf, #c79ce7, #d7b9ee, #eadaf6, #faf7fd
- Shades (toward black): #3a1556, #34134e, #2f1146, #290f3e, #270e39, #210c31, #1c0a29, #160821, #110619, #0b0410

## Harmonies

- Complementary: #365e17
- Analogous: #1c175e, #5e175a
- Triadic: #5e3f17, #175e3f
- Split-complementary: #5a5e17, #175e1c
- Tetradic: #5e1c17, #365e17, #175a5e

## Colors that go with #3f175e

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 #3f175e: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #3f175e's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Discord (https://brandsweets.com/colors/brands/discord), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Docker (https://brandsweets.com/colors/brands/docker-com). — https://brandsweets.com/colors/royalblue
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #3f175e: 4 real palettes, including SoFi's brand system and Open House, as the supporting colour. Seen in: SoFi (https://brandsweets.com/colors/brands/sofi-com), Open House (https://brandsweets.com/palettes/clean#open-house), Coastal (https://brandsweets.com/palettes/cool#coastal), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #3f175e: 4 real palettes, including Blue Mono and Purina Pro Plan's brand system, as the lead colour. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), MLB (https://brandsweets.com/colors/brands/mlb-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #3f175e in 5 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour. Seen in: Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #3f175e: 15 real palettes, including Discover's brand system and Panasonic's brand system, as the supporting colour. Seen in: Discover (https://brandsweets.com/colors/brands/discover-com), Panasonic (https://brandsweets.com/colors/brands/panasonic-com), Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/denim
- **Light Pink** #ffb6c1 [pool] — Light Pink shows up next to #3f175e in 4 real palettes, including Macaron and Sorbet, as the lead colour. Seen in: Macaron (https://brandsweets.com/palettes/light#macaron), Sorbet (https://brandsweets.com/palettes/light#sorbet), Railway (https://brandsweets.com/colors/brands/railway-app), Pastel Pop (https://brandsweets.com/palettes/playful#pastel-pop). — https://brandsweets.com/colors/lightpink
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #3f175e in 4 real palettes, including Monzo's brand system and Audi's brand system, as the supporting colour. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Audi (https://brandsweets.com/colors/brands/audi-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com), Tide (https://brandsweets.com/colors/brands/tide-com). — https://brandsweets.com/colors/orangered

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

- On white (#ffffff): 14.04:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.5:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9d53d5 (4.63:1); AA: background → #949494 (4.63:1); AAA: text → #b680e0 (7.15:1); AAA: background → #b8b8b8 (7.08:1)

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern
- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/3f175e-b79cc4-c2cb62-2d1f2d-eae9f1?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: "#3f175e" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.