Interface Essential

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Streamline 3.0

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Core

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Sharp

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Sharp Solid - Free

Sharp Neon - Free

Sharp Gradient- Free

Plump Gradient - Free

Plump Flat - Free

Core Gradient - Free

Core Pop - Free

Sharp Remix - Free

Plump Duo - Free

Core Duo - Free

Core Flat

Select Copy

Core Pop

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Plump Gradient

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Core Solid - Free

Core Remix - Free

Core Line - Free

Sharp Line

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Block – Free

Content

Plump Solid - Free

Sharp Line - Free

Core Gradient

Plump Line

Core Flat - Free

Core Neon - Free

Core Duo

Sharp Neon

Sharp Pop

Sharp Flat

Sharp Gradient

Sharp Remix

Sharp Flat - Free

Sharp Duo

Sharp Duo - Free

Sharp Pop - Free

Plump Flat

Plump Solid

Plump Remix - Free

Plump Line - Free

Plump Neon

Plump Pop - Free

Plump Remix

Plump Neon - Free

Plump Pop

Stickies Colors

<p>Core is timeless, like the Helvetica font or The Beatles. With its minimalist design and neutrality, it can adapt to any layout.&nbsp;The Duo style is perfect for projects that require differentiation between actions, using color to convey meaning effectively. It also allows you to customize the line thickness.&nbsp;All Core Duo icons are designed on a 14px grid with a 1px default stroke and two customizable colors.</p>

**Summary**: Core's two-color system — 1px rounded line with dark periwinkle blue primary and lighter blue secondary, providing colour-based hierarchy in enterprise SaaS and productivity products without full multi-color commitment. The periwinkle blue is softer than Sharp Duo's corporate blue, creating a polished two-tone system that reads as considered rather than cold. The tone signals semantic colour use: "we use colour to convey meaning, not emotion." Best for enterprise SaaS and productivity tools wanting a controlled two-tone icon system, documentation and help centre iconography, and dashboard systems where colour differentiates category or status.

**Last updated**: 2026-04-23

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## Fit & Recommendation

### Primary use cases

- Enterprise SaaS and productivity tools wanting a polished two-color icon system
- Feature overview pages in business software
- Documentation and help centre iconography
- Products with a brand blue where the duo treatment reflects the palette
- Notification and dashboard systems where icon colour differentiation conveys category or status

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## Brand & Cultural Identity

### What it communicates

> "We use colour to convey meaning, not emotion."

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## Visual & Technical Specs

### Visual properties

| Property | Value |
|----------|-------|
| Stroke weight | 1px |
| Fill | None (line only) |
| Corner treatment | Rounded corners |
| Color | Two-color: dark periwinkle blue + lighter blue secondary |

### Emotional Scores

Core Duo is near neutral on warmth leaning slightly cool — the periwinkle blue two-color system is cool but softer than sharp duo equivalents. It is one of the softer sub-styles in the catalog, as the 1px rounded line at the 14px grid remains light and non-aggressive despite the two-color structure. It is somewhat friendly, with the duo system reading as polished and considered rather than warm but not corporate. It is near neutral on playfulness leaning slightly serious — colour differentiation communicates function and hierarchy. On its human↔mechanical character, it is somewhat human-feeling — the two-color system adds systematic quality while rounded geometry retains a human register.

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## Pairing & Compatibility

### Typography pairing

- **Primary**: Inter — the blue duo system and humanist neutral type share the same functional design values
- **Alternative**: IBM Plex Sans — slightly more structured, appropriate for the slightly formal dual-colour system
- **Body**: Source Sans Pro — clean, readable, supports the two-colour icon structure
- **Avoid**: Serif fonts at body weight, warm rounded display fonts


<p>The Helvetica of icons. Core is stripped to essential form with generous spacing. It's a timeless workhorse for interface design.</p>

Minimal icons

Cut icon - Core Duo Set

Download Cut SVG vector or transparent PNG icon in Duo, Minimal, Stroke, Filled, Wireframe style(s) for Sketch and Figma. It belongs to Core Duo vectors SVG collection.