Interface Essential

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Streamline 3.0

Ultimate

Core

Flex

Sharp

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Sharp Pop - Free

Laptop Project Screen

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Sharp Duo - Free

Sharp Solid - Free

Freehand Line - Free

Business Workflow Project Management

Business

Ultimate Light - Free

Engineer Project Superviser 1

Ultimate Regular - Free

Sharp Line - Free

Ultimate Bold - Free

Freehand Duotone - Free

Ultimate Bold

Factory

Flex Remix

Computer

Flex Solid

Core Remix

Sharp Pop

Monitor Project Screen

Flex Flat

Micro Line

Project Notes Buildings

Conception Projects

Ultimate Colors

Project Book Building

Core Solid

Workflow Project Arrow

Marketing Strategy

Plump Flat

Ultimate Light

Engineer Project Helmet 1

Engineer Project Superviser 2

Project Blueprint Create

Project Home Discuss

Business Strategy

Sharp Solid

Project Notes House

Project Book House

Phone Project Screen

Screens

Ultimate Regular

Workflow Project Management

Hierachy Organization

Engineer Project Helmet 2

Micro Solid

Sharp Line

Business Workflow

Core Line

Ultimate Duotone

<p>Ultimate is the world’s largest icon family, designed by 8 expert designers. The Duotone style enhances visual depth by combining colored lines and filled shapes, perfect for matching brand or project colors. Key advantages: 1—Customizable colors. Apply up to four different colors to icon elements. 2— Adjustable stroke thickness. Create looks ranging from thin to bold for varied aesthetics.</p>

**Summary**: 1px stroke with a three-layer fill system (colored stroke + colored tint fill + selective white fill), rounded throughout, color-customizable — the most expressive and depth-forward Ultimate sub-style for UI work. The layered fill system produces a gentle visual depth that feels modern and considered rather than flat or heavy. The tone signals personality and brand expressiveness: color hierarchy built into the icon itself rather than into the surrounding layout. Best for marketing pages, onboarding flows, and feature sections where icons carry brand color and visual dimension beyond standard UI chrome.

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

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## Fit & Recommendation

### Primary use cases

- Marketing pages and feature differentiation sections
- Onboarding flows and empty states
- Landing page sections where icons carry more visual weight than UI chrome
- Products with a defined brand color where icons should reflect it
- Hero visuals that need depth without full illustration

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## Brand & Cultural Identity

### What it communicates

> "We have personality and depth."

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## Visual & Technical Specs

### Visual properties

| Property | Value |
|----------|-------|
| Stroke weight | 1px |
| Fill | Three-layer: colored stroke + colored tint fill + white fill applied selectively |
| Corner treatment | Rounded |
| Color | Teal/cyan default (customizable to brand color) |

### Emotional Scores

Ultimate Duotone is one of the friendlier sub-styles in the catalog — the default teal/cyan is a cool colour, but the partial fill softens the coldness noticeably, landing as somewhat warm overall. It is one of the softer sub-styles in the catalog — the 1px stroke combined with a low-opacity fill creates a gentle, layered softness. It is one of the friendlier sub-styles in the catalog — the colour and fill combination reads as inviting rather than formal, leaning clearly friendly. It is one of the more playful sub-styles in the catalog — the two-tone colour adds personality and levity; not fully playful but clearly expressive. On its human↔mechanical character, it is one of the more human-feeling sub-styles in the catalog — colour warmth combined with fill depth humanises the icons visually.

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## Pairing & Compatibility

### Typography pairing

- **Primary**: Plus Jakarta Sans — rounded, slightly personality-forward, matches the tonal depth
- **Alternative**: Poppins — geometric warmth, compatible with color-forward icons
- **Body**: Inter or Mulish in Regular weight
- **Avoid**: Monospace fonts (personality mismatch); serif display at high contrast


<p>The world's largest icon family with encyclopedic coverage. Designed over twelve years, Ultimate offers every concept from common to rare icons. It's a neutral style and fits most use cases.&nbsp;</p>

The encyclopedia of icons

Project Notes Buildings icon - Ultimate Duotone Set

Download Project Notes Buildings SVG vector or transparent PNG icon in Duo, Stroke, Filled style(s) for Sketch and Figma. It belongs to Ultimate Duotone vectors SVG collection.