--- title: "Flex Duo Icons Set - 5772 customizable PNGs, SVGs, PDFs" product: "Streamline Icons, Illustrations and Elements" url: /icons/flex-duo canonical_url: "https://www.streamlinehq.com/icons/flex-duo" summary: "Flex's two-color system — 1px organic line with dark periwinkle blue primary and lighter blue secondary, adding colour depth and structured hierarchy with the flowing visual quality unique to the Flex family. Organic curves keep the two-color system from reading as corporate despite the blue palette, making it softer and warmer than equivalent duo systems in more geometric families. The tone signals organic structure: \"we differentiate through flow, not rigidity.\" Best for modern SaaS wanting a two-tone icon system with organic visual quality, products with a brand blue where the duo adds depth without imposing rigid geometry, and feature and documentation sections." --- # Flex Duo Icons Set - 5772 customizable PNGs, SVGs, PDFs Flex is all about the curves. Its smooth curves brings fluidity and dynamism to your designs with a modern appeal. 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. All Flex Duo icons are designed on a 14px grid with a 1px default stroke and two customizable colors. 5772 icons ## Fit & Recommendation ### Primary use cases - Modern SaaS wanting a two-tone icon system with organic visual quality - Products with a brand blue where the duo treatment adds depth without rigid geometry - Feature comparison, help, and documentation sections --- ## Brand & Cultural Identity ### What it communicates > "We differentiate through flow, not rigidity." --- ## Visual & Technical Specs ### Visual properties | Property | Value | |----------|-------| | Stroke weight | 1px | | Fill | None (line only) | | Corner treatment | Smooth fluid curves | | Color | Dark periwinkle blue + lighter blue secondary | ### Emotional Scores Flex Duo is somewhat warm — the blue two-color palette is cool, but organic 1px curves soften the coolness compared to geometric duo sets. It is among the softest sub-styles in the catalog — the 1px organic curves in a two-color system remain visually soft despite the structural intent. It is somewhat warm on friendliness — the two-color system adds structure while organic shapes keep it from reading as corporate. It is near neutral on playfulness leaning slightly serious — colour differentiation reads as functional and considered rather than playful or severe. On its human↔mechanical character, it is one of the more human-feeling sub-styles in the catalog — the two-color system adds semantic structure while organic curves retain a natural quality. --- ## Pairing & Compatibility ### Typography pairing - **Primary**: Plus Jakarta Sans — humanist warmth appropriate for the flowing two-color system - **Alternative**: Outfit — modern humanist, pairs with the blue duo - **Body**: Inter Regular - **Avoid**: IBM Plex Sans — engineering register creates personality conflict with organic curves ## Example icons - [3d Perspective Grid](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/3d-perspective-grid-1krlpndnj2q1y6glbg1103.png/3d-perspective-grid-vgosupywiy4gatvknrlut.png?_a=DATAiZkSZAA0) - [Apply To All](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/apply-to-all-kcc8yaxqm56t83whfj3xu.png/apply-to-all-7htobrgajfwlnw5x054xda.png?_a=DATAiZkSZAA0) - [Attach File Add](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/attach-file-add-dzvtk1k8r877wbah06s0r.png/attach-file-add-ewobwvensirsh729zusyn.png?_a=DATAiZkSZAA0) - [Attach File Off](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/attach-file-off-99c7p7h74fs5h3d2222mij.png/attach-file-off-4jnwigvcj9lahwgg5tsv6.png?_a=DATAiZkSZAA0) - [Auto Fit Column Width](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/auto-fit-column-width-mjp2wuo67ba3xq9m011tal.png/auto-fit-column-width-hl7xr24hqpttcw1mmr2rw.png?_a=DATAiZkSZAA0) - [Auto Fit Row Height](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/auto-fit-row-height-2ayu5jaa4dbrkqqqqwkxb.png/auto-fit-row-height-k41f0qewwkgs8f3tyuboro.png?_a=DATAiZkSZAA0) - [Auto Save Backup](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/auto-save-backup-3wkzvwhfc8t37oat6eeus.png/auto-save-backup-vk77uwclgghahairz4ceba.png?_a=DATAiZkSZAA0) - [Binder Clip](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/binder-clip-dbefy1uzrrv2fxewm5nw2k.png/binder-clip-xvi14mar3vdp156g9rwpi.png?_a=DATAiZkSZAA0) - [Binoculars](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/binoculars-xu8f1ebmpujwggc2kcdn2g.png/binoculars-sbkj3xeal4diuyiotjnt.png?_a=DATAiZkSZAA0) - [Bomb](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/bomb-6yrv9leszw7yonm7bmxw2.png/bomb-iudg90axlaw72f5rd21w.png?_a=DATAiZkSZAA0) - [Brush Pen Tip Diagonal](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/brush-pen-tip-diagonal-fb60c.png?_a=DATAiZkSZAA0) - [Brush Pen Tip Vertical](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/edit/brush-pen-tip-vertical-df6f3.png?_a=DATAiZkSZAA0) --- [View full sitemap](/sitemap.md)