Figma Variables, introduced in 2023, are probably the biggest improvement to design systems in Figma since Styles were added. They give you a native, structured way to manage design tokens directly inside the tool, which cuts out a lot of the plugin-dependent workarounds teams had been cobbling together for years.

Design tokens are the raw values behind visual decisions: a color like #0057FF, a spacing value of 16px, a border radius of 8px. Before Variables, you handled these through Figma Styles (Color, Text, Effect), which honestly weren't built for the job. Styles had no concept of modes, aliases, or primitive-to-semantic mapping. They worked fine for simple projects and fell apart fast on anything complex.

Variables fix that. There are four types: Color, Number, String, and Boolean. Each lives in a Collection and can be organized into Modes, so you can define Light and Dark themes in a single collection and flip between them at the frame level with one click. For teams maintaining multi-theme systems, this alone is worth the switch.

The aliasing support is where things get genuinely useful. You can build a two-tier token architecture: primitives (blue/500 = #0057FF) and semantic tokens (color/action/primary = blue/500). When a brand refresh happens and blue/500 changes, every semantic token referencing it updates automatically. Anyone who has manually hunted down color values across a large library knows exactly how much time that saves.

Number variables handle spacing, sizing, and corner radius as named tokens you can apply to any layer property. Boolean variables control component visibility or toggle states. String variables hold text content, which is handy when prototyping localization flows.

For handoff, Variables map cleanly to CSS Custom Properties. Plugins like Variables to JSON and Token Studio let you export them and sync with a code repository, so design and engineering can share the same source of truth instead of playing catch-up after every design update. It's not a perfect system yet, but it's a real one.