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# Design System Inspired by Slack
## 1. Visual Theme & Atmosphere
Slack's marketing website is a confident, enterprise-friendly showcase that balances Salesforce's corporate muscle with Slack's original playful personality. The design operates on a white canvas with deep aubergine purple (`#481a54`, `#4a154b`) as the signature brand color — a rich, wine-dark hue that distinguishes Slack from every blue-dominated enterprise tool. Product screenshots and animated UI demos punctuate the white space, creating a "see it in action" experience.
The typography reflects Slack's acquisition by Salesforce: Salesforce-Avant-Garde handles display headings at massive scale (64px, weight 700) with negative letter-spacing (-0.768px), while Salesforce-Sans serves as the UI/body workhorse. Both fonts carry Salesforce's geometric precision but retain enough warmth to feel approachable. Uppercase button labels with positive letter-spacing (0.8px–0.96px) create a systematic, enterprise-label voice.
What makes Slack distinctive is its hover behavior: buttons transition from a soft lavender (`#f9f0ff`) to deep aubergine (`#4a154b`) on hover with a `translate(3px)` shift — a playful micro-animation that retains Slack's personality within the Salesforce design language. The sidebar highlight blue (`#1264a3`) provides the secondary interactive accent, and the overall shadow system uses soft, wide-radius shadows (`0px 0px 32px` at 0.1 opacity) that create a gentle, cloud-like elevation.
**Key Characteristics:**
- Aubergine purple (`#481a54`, `#4a154b`) as singular brand color — distinctive in an ocean of blue enterprise tools
- Salesforce-Avant-Garde for display (up to 64px, weight 700, negative tracking)
- Salesforce-Sans for body/UI with both positive and negative letter-spacing variants
- Soft lavender button (`#f9f0ff`) → aubergine hover with translate(3px) animation
- Sidebar Blue (`#1264a3`) as secondary interactive accent
- Uppercase labels with wide tracking (0.8px–0.96px) for enterprise structure
- Soft, wide-radius shadows (32px blur at 0.1 opacity) — cloud-like elevation
- Purple inset ring (`rgb(97,31,105) 0px 0px 0px 1px inset`) for active states
## 2. Color Palette & Roles
### Primary Brand
- **Aubergine** (`#481a54`): Deep purple brand color — hero backgrounds, dark sections
- **Aubergine Dark** (`#4a154b`): Button hover, slightly different shade for depth
- **Aubergine Link** (`#611f69`): Purple link text variant
### Interactive
- **Sidebar Blue** (`#1264a3`): `--sidebar-highlight-color`, active states, focus borders
- **Hover Blue** (`#3860be`): All link hover states transition to this blue
- **Lavender Surface** (`#f9f0ff`): Primary button background — soft, inviting purple tint
- **Purple Border** (`#592466`): Button borders on purple context
- **Purple Inset** (`rgb(97, 31, 105)`): Inset ring shadow for active/focus
### Text
- **White** (`#ffffff`): Primary text on dark/purple surfaces
- **Near Black** (`#1d1d1d`): Primary text on light surfaces
- **Black** (`#000000`): Secondary, attachment color
- **Mid Gray** (`#696969`): Muted text, secondary descriptions
### Shadows
- **Soft Wide** (`rgba(0,0,0,0.1) 0px 0px 32px`): Primary card elevation — cloud-like
- **Button Lift** (`rgba(0,0,0,0.1) 0px 5px 20px`): Button default shadow
- **Subtle** (`rgba(0,0,0,0.2) 0px 1px 10px`): Light elevation
## 3. Typography Rules
### Font Families
- **Display**: `Salesforce-Avant-Garde`, fallbacks: `system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans`
- **Body / UI**: `Salesforce-Sans`, same fallback stack
### Hierarchy
| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|------|------|------|--------|-------------|----------------|-------|
| Display Hero | SF-Avant-Garde | 64px (4.00rem) | 700 | 1.12 (tight) | -0.768px | Maximum impact |
| Display Secondary | SF-Avant-Garde | 58px (3.63rem) | 600 | 1.25 (tight) | -0.464px | Sub-hero |
| Section Heading | SF-Avant-Garde | 50px (3.13rem) | 700 | 1.12 (tight) | -0.6px | Feature sections |
| Sub-heading | SF-Avant-Garde | 32px (2.00rem) | 700 | 1.25 (tight) | -0.256px | Card headings |
| Card Title | SF-Avant-Garde | 24px (1.50rem) | 700 | 1.33 | -0.096px | Smaller headings |
| Feature Label | SF-Avant-Garde | 18px (1.13rem) | 600 | 1.56 | -0.0216px | Feature emphasis |
| Body Bold | Salesforce-Sans | 18px (1.13rem) | 700 | 1.55–1.67 | -0.072px | Strong body |
| Body | Salesforce-Sans | 18px (1.13rem) | 400 | 1.55 | -0.0216px | Standard reading |
| Body Light | Salesforce-Sans | 18px (1.13rem) | 300 | — | — | Light variant |
| Button Large | SF-Avant-Garde / SF-Sans | 18px (1.13rem) | 700 | — | — | Primary CTA |
| Button | Salesforce-Sans | 16px (1.00rem) | 700 | 1.38 | 0.2px | Standard button |
| Nav Bold | Salesforce-Sans | 15px (0.94rem) | 700 | 1.55 | -0.0216px | Navigation |
| Caption | Salesforce-Sans | 14px (0.88rem) | 400–700 | 1.30–1.55 | 0.1px | Metadata |
| Uppercase Label | Salesforce-Sans | 14px (0.88rem) | 700 | 1.29 (tight) | 0.798px | `text-transform: uppercase` |
| Uppercase Small | Salesforce-Sans | 12px (0.75rem) | 700 | 1.00 (tight) | 0.96px | `text-transform: uppercase` |
### Principles
- **Dual-font Salesforce system**: Avant-Garde for display authority, Sans for body reliability. The enterprise weight of Salesforce's type system gives Slack corporate credibility.
- **Negative tracking on display**: -0.256px to -0.768px on headings creates compressed, impactful titles.
- **Positive tracking on labels**: +0.2px to +0.96px on uppercase labels creates the structured enterprise labeling system.
- **Weight 700 dominant for headings**: Both fonts use bold as the primary heading weight — confident, not subtle.
## 4. Component Stylings
### Buttons
**Primary Lavender**
- Background: `#f9f0ff` (soft lavender)
- Text: `#000000`
- Padding: 10px 30px
- Shadow: `rgba(0,0,0,0.1) 0px 5px 20px`
- Hover: background `#4a154b` (aubergine), text white, border `2px solid #1264a3`, translate(3px)
- Active: text `#1264a3`, inset ring `rgb(255,255,255) 0px 0px 0px 2px inset`, dotted outline `#611f69`
- The signature button — lavender to aubergine on hover
**Pill Button (90px radius)**
- Salesforce-Sans 16px weight 700
- Various background treatments
- 90px radius creates large pill shape
**Uppercase Small**
- Salesforce-Sans 12px weight 700
- `text-transform: uppercase`
- Letter-spacing: 0.96px
- 4px radius
### Cards & Containers
- Background: white
- Radius: 16px (cards), 48px (large panels)
- Shadow: `rgba(0,0,0,0.1) 0px 0px 32px` (soft, wide)
- Border: `1px solid rgba(0,0,0,0.04)` (ultra-subtle)
- Product screenshots as primary card content
### Navigation
- Dark aubergine header or white header
- Salesforce-Sans 15px weight 700 for nav links
- Slack/Salesforce logo left-aligned
- Lavender CTA button right-aligned
- Mobile: hamburger with 4px radius toggle
## 5. Layout Principles
### Spacing System
- Base unit: 8px
- Scale: 4px, 5px, 6px, 8px, 10px, 12px, 16px, 19px, 20px, 23px, 24px, 28px
### Grid & Container
- Centered content with generous max-width
- Product demo sections with screenshots
- Stat counter sections with large numbers
- Trust bar with company logos
- Full-width aubergine footer
### Whitespace Philosophy
- **Enterprise generosity**: Wide spacing between sections creates a professional, unhurried pace that communicates stability.
- **Demo-forward**: Product screenshots and UI demos get generous space to breathe.
### Border Radius Scale
- Minimal (2px): Close buttons, small utility
- Subtle (4px): Standard buttons, search
- Standard (8px): List items, video containers
- Comfortable (12px): Video, medium panels
- Card (16px): Feature cards, navigation
- Large (48px): Hero panels, large containers
- Pill (90px): Primary CTA buttons
## 6. Depth & Elevation
| Level | Treatment | Use |
|-------|-----------|-----|
| Flat (Level 0) | No shadow | Default surfaces |
| Soft Wide (Level 1) | `rgba(0,0,0,0.1) 0px 0px 32px` | Cards, demo panels |
| Button (Level 2) | `rgba(0,0,0,0.1) 0px 5px 20px` | CTA buttons |
| Subtle (Level 3) | `rgba(0,0,0,0.2) 0px 1px 10px` | Dropdowns |
| Purple Inset | `rgb(97,31,105) 0px 0px 0px 1px inset` | Active state ring |
**Shadow Philosophy**: Slack uses notably wide-radius shadows (32px blur) at low opacity (0.1), creating a cloud-like floating quality. Elements don't appear elevated — they appear to gently hover, reflecting the "Slack is where work happens in the cloud" metaphor.
## 7. Do's and Don'ts
### Do
- Use aubergine (`#481a54` / `#4a154b`) as the primary brand color — it's Slack's identity
- Apply the lavender-to-aubergine hover transition on primary buttons
- Use Salesforce-Avant-Garde for display headings only, Salesforce-Sans for everything else
- Apply uppercase + positive letter-spacing (0.8px–0.96px) for labels and small buttons
- Use wide-radius shadows (32px blur) for cloud-like elevation
- Include the translate(3px) hover animation on buttons
- Use Sidebar Blue (`#1264a3`) for secondary interactive accents
### Don't
- Don't use standard blue as the primary brand color — aubergine is non-negotiable
- Don't skip the hover animation (translate + color shift) on primary buttons
- Don't use heavy/sharp shadows — Slack's elevation is soft and wide
- Don't apply negative letter-spacing to button labels — buttons use positive tracking
- Don't use aubergine as body text color — it's for surfaces and dark sections
- Don't mix Avant-Garde into body text — it's display-only
## 8. Responsive Behavior
### Breakpoints
| Name | Width | Key Changes |
|------|-------|-------------|
| Mobile | <479px | Single column, hamburger nav |
| Mobile Large | 479–768px | Slight adjustments |
| Tablet | 768–1024px | 2-column layouts begin |
| Desktop | 1024–1280px | Standard desktop layout |
| Large Desktop | 1280–1440px | Expanded |
| Ultra-wide | >1440px | Maximum width |
### Collapsing Strategy
- Hero: 64px → 50px → scales down
- Navigation: horizontal → hamburger (4px radius toggle)
- Feature sections: side-by-side → stacked
- Stats: horizontal counters → vertical
- Buttons: maintain pill shape, full-width on mobile
## 9. Agent Prompt Guide
### Quick Color Reference
- Brand: Aubergine (`#481a54`)
- Button: Lavender (`#f9f0ff`)
- Button hover: Aubergine Dark (`#4a154b`)
- Interactive: Sidebar Blue (`#1264a3`)
- Text light: White (`#ffffff`)
- Text dark: Near Black (`#1d1d1d`)
- Muted: Mid Gray (`#696969`)
### Example Component Prompts
- "Create a hero: white background. Headline at 64px Salesforce-Avant-Garde weight 700, line-height 1.12, letter-spacing -0.768px, black text. Lavender CTA button (#f9f0ff, 10px 30px padding, shadow rgba(0,0,0,0.1) 0px 5px 20px). On hover: aubergine (#4a154b) background, white text, translate(3px)."
- "Design an aubergine section: #481a54 background. White text at 32px SF-Avant-Garde weight 700. Stat counters at 50px weight 700."
- "Build uppercase label: 12px Salesforce-Sans weight 700, text-transform uppercase, letter-spacing 0.96px."
- "Create a card: white background, 16px radius, shadow rgba(0,0,0,0.1) 0px 0px 32px. Product screenshot inside."
### Iteration Guide
1. Aubergine purple is the signature — every design should include it somewhere
2. Lavender (#f9f0ff) buttons with aubergine hover = the Slack interaction
3. Salesforce-Avant-Garde for display, Salesforce-Sans for body — strict split
4. Uppercase + positive tracking for labels and small buttons
5. Soft wide shadows (32px blur) for the cloud-floating quality
6. translate(3px) on hover for playful enterprise personality

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# Slack Inspired Design System
Design system details have been moved to: https://getdesign.md/slack/design-md
You can also view previews, dark mode examples, and download options on getdesign.md.