Interface Essential

Business

Images Photography

Money Shopping

Programming

Computer Devices

Phone

Mail

Map Travel

Food Drink

Nature Ecology

Entertainment

Shipping

Culture

Health

Work Education

Artificial Intelligence

Arrows

Streamline 3.0

Ultimate

Core

Flex

Sharp

Plump

Micro

Freehand

Streamline Material

Nova

Cyber

Streamline Vault

Logos

Pixel

Google Material

Tabler

Remix

Feather

Iconoir

Carbon

Solar

Lucide

Brand Logos

Bootstrap

Atlas

Unicons

Ionic Icons

Phosphor

MingCute

Font Awesome

Majesticons

Mynaui

Radix

Heroicons

Flagpack

Core Gradient - Free

Rainbow

Core Neon - Free

Core Flat - Free

Core Line - Free

Core Remix - Free

Core Solid - Free

Core Duo - Free

Kameleon Pop - Free

Kameleon Duo - Free

Kameleon Colors - Free

Kameleon Colors

Weather

Plump Remix

Nature

Micro Line

Sharp Solid

Flex Line

Sharp Line

Sharp Line - Streamline Material

Maps

Plump Line

Kameleon Duo

Kameleon Pop

Outlined Line - Streamline Material

Rounded Line - Streamline Material

Plump Neon

Plump Solid

Plump Gradient

Plump Duo

Plump Pop

Plump Flat

Core Line

Micro Solid

Sharp Duo

Sharp Remix

Sharp Flat

Sharp Gradient

Sharp Neon

Sharp Pop

Flex Pop

Flex Neon

Flex Flat

Flex Gradient

Flex Solid

Flex Duo

Flex Remix

Core Duo

Core Neon

Core Pop

Core Gradient

Core Flat

Core Remix

Core Pop - Free

<p>Flex is all about the curves. Its smooth curves brings fluidity and dynamism to your designs with a modern appeal.&nbsp;The Gradient style is best suited for designs where impact and immersion are key, especially on dark backgrounds. All Flex Gradient icons are designed on a 14px grid using filled shapes as gradient colors.</p>

**Summary**: Flex's most expressive sub-style — full-spectrum multi-stop gradient fills on fluid organic silhouettes, creating a distinctive high-production marketing presence that geometric gradient sets cannot replicate. Flowing organic edges amplify the warm gradient stops in a way that flat geometric fills cannot. The tone signals expressive flow: "we are expressive and flowing." Best for high-production landing pages, hero sections, and brand marketing at display sizes where flowing gradient silhouettes create visual distinction from geometric gradient equivalents.

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

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## Fit & Recommendation

### Primary use cases

- High-production landing pages and feature banners
- Hero sections where icons are focal points
- Brand marketing at display sizes where flowing gradient silhouettes create distinction from geometric gradient sets

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## Brand & Cultural Identity

### What it communicates

> "We are expressive and flowing."

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## Visual & Technical Specs

### Visual properties

| Property | Value |
|----------|-------|
| Stroke weight | None |
| Fill | Solid fills with full-spectrum multi-stop gradients |
| Corner treatment | Fluid organic silhouettes |
| Color | Full-spectrum gradients per icon |

### Emotional Scores

Flex Gradient is one of the warmer sub-styles in the catalog — full-spectrum gradients with warm tones on organic silhouettes allow flowing shapes to amplify the warm gradient stops. It is one of the softer sub-styles in the catalog — gradient fills on organic silhouettes with flowing edges prevent the hardness of flat geometric fills. It is one of the friendlier sub-styles in the catalog — rainbow gradients in flowing shapes read as expressive and contemporary. It is one of the more playful sub-styles in the catalog in a refined way — gradient energy with organic forms reads as creative and modern, more refined than outright playful. On its human↔mechanical character, it is one of the most human-feeling sub-styles in the catalog — colour expressiveness combined with organic silhouettes reads as human creative expression.

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## Pairing & Compatibility

### Typography pairing

- **Primary**: Syne — flowing display geometric mirrors the expressive quality of gradient-filled organic silhouettes
- **Alternative**: Plus Jakarta Sans Bold — humanist weight holding alongside the visual richness of gradient fills
- **Body**: Outfit Regular or DM Sans
- **Avoid**: Cold geometric grotesque; cartoon rounded display fonts


<p>Flex is a fluid icon family inspired by nature’s curves. It favors smooth, flowing forms. More organic than Core and subtler than the chunky Plump. Read about the <a href="https://blog.streamlinehq.com/flex/" rel="noopener noreferrer" target="_blank">design process</a>.</p>

Fluid icons

Rainbow Cloud

Rainbow Cloud icon - Flex Gradient Set

Download Rainbow Cloud SVG vector or transparent PNG icon in Gradient style(s) for Sketch and Figma. It belongs to Flex Gradient vectors SVG collection.