# #310d40

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

## Values

- Hex: `#310d40`
- RGB: rgb(49, 13, 64)
- HSL: hsl(282, 66%, 15%)
- OKLCH: oklch(0.248 0.096 314.1)
- Relative luminance: 0.0131
- Nearest named color: Dark Purple (#35063e, Δ 1.485) — https://brandsweets.com/colors/dark-purple
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/310d40

## Tints & shades

- Tints (toward white): #4a1461, #671c87, #8123a9, #9b2acb, #ae49da, #bd6be1, #cc8de8, #dbafef, #ecd5f6, #fbf7fd
- Shades (toward black): #2d0c3b, #2a0b37, #270a33, #230a2f, #20092a, #1a0722, #17061e, #130519, #100415, #0d0311

## Harmonies

- Complementary: #1c3f0d
- Analogous: #170d3f, #3f0d35
- Triadic: #3f300d, #0d3f30
- Split-complementary: #353f0d, #0d3f17
- Tetradic: #3f170d, #1c3f0d, #0d353f

## Colors that go with #310d40

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 #310d40: softer than #000 and cool enough to feel like part of the same palette. Seen in: Volkswagen (https://brandsweets.com/colors/brands/vw-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: complementary] — Sea Green sits directly opposite #310d40 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Wellness (https://brandsweets.com/palettes/warm#wellness), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: triadic] — Sienna completes a triad with #310d40 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), 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 #310d40's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Sentry (https://brandsweets.com/colors/brands/sentry-io), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Superhuman (https://brandsweets.com/colors/brands/superhuman-com), GitLab (https://brandsweets.com/colors/brands/gitlab). — https://brandsweets.com/colors/slateblue
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #310d40 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Lufthansa (https://brandsweets.com/colors/brands/lufthansa-com), Clinic (https://brandsweets.com/palettes/clean#clinic), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Alpine (https://brandsweets.com/palettes/cool#alpine). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #310d40 in 18 real palettes, including Southwest Airlines's brand system and Blueprint, as the accent. Seen in: Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 19 real palettes, including Sketch's brand system and Penpot's brand system put Blue beside #310d40, as the accent. Seen in: Sketch (https://brandsweets.com/colors/brands/sketch-com), Penpot (https://brandsweets.com/colors/brands/penpot-app), Monzo (https://brandsweets.com/colors/brands/monzo-com), Warp (https://brandsweets.com/colors/brands/warp-dev). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #310d40 in 6 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour. Seen in: ClickUp (https://brandsweets.com/colors/brands/clickup-com), Yahoo (https://brandsweets.com/colors/brands/yahoo-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Prepare your taste buds... (https://brandsweets.com/colors/brands/grubhub-com). — https://brandsweets.com/colors/blueviolet

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

- On white (#ffffff): 16.64:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.26:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #ac45d9 (4.61:1); AA: background → #858585 (4.51:1); AAA: text → #c378e3 (7.12:1); AAA: background → #ababab (7.25:1)

## 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/310d40-ba9fc1-b4cb62-2d1f2b-ebe9f1?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: "#310d40" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.