Sintia System Design

A Flutter design system package with configurable theming, and UI components. Built to give consuming apps full control over colors and typography while keeping UI consistency.

Installation

Add the package to your pubspec.yaml:

dependencies:
  sintia_system_design: ^0.0.1

Then run:

flutter pub get

Setup

Configure the theme in your app's main.dart using SintiaThemeConfig and SintiaTheme:

import 'package:sintia_system_design/sintia_system_design.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    const config = SintiaThemeConfig(
      primaryColor: Colors.blue,
      secondaryColor: Colors.indigo,
      primaryFont: 'YourPrimaryFont',
      secondaryFont: 'YourSecondaryFont',
      tertiaryFont: 'YourTertiaryFont', // optional
    );

    return MaterialApp(
      theme: SintiaTheme.light(config),
      darkTheme: SintiaTheme.dark(config),
      home: const MyHomePage(),
    );
  }
}

Fonts must be registered in your app's pubspec.yaml. The package is font-source agnostic — use local assets or any font package like google_fonts.

Font roles

Text roles	Font used
display*, headline*	primaryFont
title*, body*	secondaryFont
label*	tertiaryFont if provided, otherwise secondaryFont

Components

SintiaText

A styled text widget that wraps Flutter's Text.

SintiaText(
  'Hello World',
  style: TextStyle(fontSize: 16),
  maxLines: 2,
  overflow: TextOverflow.ellipsis,
)

SintiaCard

A surface container with consistent border, shadow, and radius tokens applied.

SintiaCard(
  padding: EdgeInsets.all(SintiaSizes.size2),
  child: Text('Card content'),
)

Design Tokens

Colors — AppColors

Semantic color palette and gray scale:

AppColors.statusDanger01
AppColors.statusSuccess01
AppColors.statusWarning
AppColors.statusDisabled
AppColors.scale00 // white
AppColors.scale06 // darkest gray

Sizes — SintiaSizes

Spacing and border radius tokens based on a Fibonacci-like scale:

SintiaSizes.size1  // 10
SintiaSizes.size2  // 20
SintiaSizes.size3  // 30
// ...up to size9

SintiaSizes.radius1  // 10
SintiaSizes.radius2  // 20

Shadows — SintiaShadows

Three elevation levels:

SintiaShadows.s1  // subtle
SintiaShadows.s2  // medium
SintiaShadows.s3  // strong

Elevations — SintiaElevations

SintiaElevations.s1  // 2
SintiaElevations.s2  // 4
// ...up to s6

Extensions

BuildContext

Quick access to theme properties:

context.theme
context.colorScheme
context.textTheme
context.primaryColor
context.errorColor

TextStyle

Compose styles fluently:

someStyle.primary(context)    // applies colorScheme.primary
someStyle.secondary(context)  // applies colorScheme.secondary
someStyle.withColor(AppColors.statusDanger01)

Links

• Website: sintia.tech
• Repository: github.com/sintia-tech/sintia-system-design
• Issues: github.com/sintia-tech/sintia-system-design/issues