easy_radial_gradient 1.0.1

Design-tool-style radial gradients for Flutter. Define each stop as position + color + opacity (like Figma), with optional Gaussian and frosted-glass backdrop blur.

easy_radial_gradient

Design-tool-style radial gradients for Flutter.

[easy_radial_gradient showcase]

From left: a one-line glow, a 6-stop multi-color gradient, a Gaussian-blurred glow, and a frosted-glass card using backdrop blur.

Why this exists

I kept reaching for radial gradients the way Figma does them — drop a stop, give it a position, a color and an opacity, repeat — and every time I had to mentally "unzip" that into Flutter's two separate colors and stops lists and keep the indexes aligned by hand. It's error-prone (shift one list and the whole gradient breaks) and reads nothing like the design it came from.

On top of that, a radial gradient is most useful as a soft glow or a frosted panel, which usually means wiring up ImageFiltered / BackdropFilter yourself every single time.

easy_radial_gradient fixes both: one self-describing stop per entry, and blur + backdrop blur built into the widget.

Flutter's built-in RadialGradient makes you pass two parallel lists — colors and stops — and keep them aligned by index:

// vanilla Flutter 😖
RadialGradient(
  colors: [
    Colors.orange,
    Colors.deepOrange,
    Colors.deepOrange.withValues(alpha: 0),
  ],
  stops: [0.0, 0.5, 1.0],
)

Every design tool (Figma, Sketch, XD) instead treats a gradient as a list of stops, where each stop bundles its position, color and opacity together. This package does the same:

// easy_radial_gradient 🙂
EasyRadialGradient(
  colorStops: const [
    RadialStop.start(color: Colors.orange),                   // position 0.0
    RadialStop.at(0.5, color: Colors.deepOrange),             // position 0.5
    RadialStop.end(color: Colors.deepOrange, opacity: 0.0),   // position 1.0
  ],
)

…plus optional Gaussian blur and frosted-glass backdrop blur through the RadialGradientBox widget.

Features

• 🎨 Figma-style stops — RadialStop.start / .at / .end (or RadialStop(position, color, opacity)), no more index-aligned lists.
• 🔁 Drop-in — EasyRadialGradient is a RadialGradient, so it works in any BoxDecoration, ShapeDecoration, etc.
• 🌫️ Blur — soften the gradient itself (blur) while keeping child content crisp.
• 🪟 Backdrop blur — frosted-glass effect over whatever is behind the box (backdropBlur).
• ⭕ Shapes — circle (default) or rounded rectangle, with correct clipping.
• 🔢 Auto-sorted stops — declare them in any order.

Install

dependencies:
  easy_radial_gradient: ^0.0.1

import 'package:easy_radial_gradient/easy_radial_gradient.dart';

Usage

As a gradient (drop-in)

Container(
  decoration: BoxDecoration(
    shape: BoxShape.circle,
    gradient: EasyRadialGradient(
      colorStops: const [
        RadialStop.start(color: Colors.purple),
        RadialStop.at(0.6, color: Colors.purple, opacity: 0.4),
        RadialStop.end(color: Colors.purple, opacity: 0.0),
      ],
    ),
  ),
);

A one-line glow shortcut:

EasyRadialGradient.glow(Colors.cyan);

Multi-stop gradients

Add as many RadialStop.at(...) entries as you like — there is no limit, and they're sorted by position automatically, so declaration order doesn't matter:

EasyRadialGradient(
  colorStops: const [
    RadialStop.start(color: Color(0xFFFF4D8D)),               // 0.0
    RadialStop.at(0.25, color: Color(0xFFFFC857)),
    RadialStop.at(0.50, color: Color(0xFF4DD0FF)),
    RadialStop.at(0.75, color: Color(0xFF7C4DFF)),
    RadialStop.end(color: Color(0xFF7C4DFF), opacity: 0.0),   // 1.0
  ],
);

As a widget (with blur)

RadialGradientBox(
  width: 220,
  height: 220,
  colorStops: const [
    RadialStop.start(color: Colors.cyan),
    RadialStop.end(color: Colors.cyan, opacity: 0.0),
  ],
  blur: 18,          // Gaussian-blur the glow itself
  backdropBlur: 10,  // frost whatever is behind the box
  child: const Center(child: Text('Glow')),
);

Rounded rectangle (card)

RadialGradientBox(
  shape: BoxShape.rectangle,
  borderRadius: BorderRadius.circular(24),
  backdropBlur: 20,
  colorStops: const [
    RadialStop.start(color: Colors.white, opacity: 0.30),
    RadialStop.end(color: Colors.white, opacity: 0.05),
  ],
  child: const Padding(
    padding: EdgeInsets.all(20),
    child: Text('Frosted card'),
  ),
);

How blur layers compose

RadialGradientBox stacks three things, innermost to outermost:

1. The gradient fill, clipped to shape.
2. blur → a Gaussian blur applied to the gradient layer only. A child is drawn sharply on top.
3. backdropBlur → a BackdropFilter clipped to shape, blurring everything painted behind the box. The frost shows through the transparent parts of your gradient.

Set either blur to 0 (the default) to skip its layer entirely.

API

Type	What it is
RadialStop	One stop: position (0–1), color, opacity (0–1). Named constructors: .start, .at(position), .end, .transparent.
EasyRadialGradient	A RadialGradient built from RadialStops. Also EasyRadialGradient.glow(color).
RadialGradientBox	Widget that paints the gradient with optional blur / backdropBlur and circle/rounded-rect clipping.

RadialStop.opacity is a multiplier on top of the color's own alpha, so it stacks exactly like opacity does in a design tool.

License

MIT © 2026 keepYaoung <[e-mail]>

Author

Made by keepYaoung — [e-mail]

Issues and PRs welcome at https://github.com/keepYaoung/easy-radial-gradient.