# #331f42

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

## Values

- Hex: `#331f42`
- RGB: rgb(51, 31, 66)
- HSL: hsl(274, 36%, 19%)
- OKLCH: oklch(0.282 0.067 309.1)
- Relative luminance: 0.0208
- Nearest named color: Midnight Velvet (#2a2243, Δ 1.898) — https://brandsweets.com/colors/midnight-velvet
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/331f42

## Tints & shades

- Tints (toward white): #482c5e, #5e3979, #734695, #8855af, #9b71bc, #ac89c8, #c0a5d5, #d3c1e2, #e7dcef, #faf8fc
- Shades (toward black): #301d3e, #2b1a37, #281834, #23152d, #20142a, #1b1023, #180f1f, #130b18, #100a15, #0b070e

## Harmonies

- Complementary: #2e421f
- Analogous: #211f42, #421f40
- Triadic: #42331f, #1f4233
- Split-complementary: #40421f, #1f4221
- Tetradic: #42211f, #2e421f, #1f4042

## Colors that go with #331f42

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 #331f42: softer than #000 and cool enough to feel like part of the same palette. Seen in: Volkswagen (https://brandsweets.com/colors/brands/vw-com), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Boeing (https://brandsweets.com/colors/brands/boeing-com), Squarespace (https://brandsweets.com/colors/brands/squarespace-com). — https://brandsweets.com/colors/charcoal
- **Dark Olive Green** #556b2f [harmony, pool: complementary] — Dark Olive Green sits directly opposite #331f42 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal), Cohere (https://brandsweets.com/colors/brands/cohere-com), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen). — https://brandsweets.com/colors/darkolivegreen
- **Sienna** #a0522d [harmony, pool: triadic] — Sienna completes a triad with #331f42 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Harvest (https://brandsweets.com/palettes/warm#harvest), BrandSweets (https://brandsweets.com/colors/brands/brandsweets). — https://brandsweets.com/colors/sienna
- **Slate Blue** #6a5acd [harmony, pool: analogous] — Slate Blue is #331f42's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Superhuman (https://brandsweets.com/colors/brands/superhuman-com), GitLab (https://brandsweets.com/colors/brands/gitlab), Marvel (https://brandsweets.com/colors/brands/marvel-com), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas). — https://brandsweets.com/colors/slateblue
- **Teal** #008080 [harmony, pool: split] — Teal is a split-complement of #331f42: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Clinic (https://brandsweets.com/palettes/clean#clinic). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #331f42 in 11 real palettes, including Beach Hut and Southwest Airlines's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 17 real palettes, including Sketch's brand system and Monzo's brand system put Blue beside #331f42, as the accent. Seen in: Sketch (https://brandsweets.com/colors/brands/sketch-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 6 real palettes, including Blush and Graphite Mono put Blush Pink beside #331f42, as the supporting colour. Seen in: Blush (https://brandsweets.com/palettes/light#blush), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding). — https://brandsweets.com/colors/blush-pink

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

- On white (#ffffff): 14.84:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.42:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9263b6 (4.68:1); AA: background → #8f8f8f (4.59:1); AAA: text → #ac89c8 (7.17:1); AAA: background → #b3b3b3 (7.08:1)

## Brands using this color

- **Sketch** — primary #2c203b (Δ 1.982) — https://brandsweets.com/colors/brands/sketch-com

## Curated palettes containing it

- **Lavender Haze** (playful, cool, light) — #8b5cf6, #c4b5fd, #f472b6, #faf7ff, #2e1f47 — Violet and pink on lilac-white: Gen-Z friendly, while the deep plum text keeps it legible. — tool: https://brandsweets.com/palettes/new/8b5cf6-c4b5fd-f472b6-faf7ff-2e1f47 — collection: https://brandsweets.com/palettes/playful

## Fonts for this mood

- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold
- 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/331f42-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: "#331f42" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.