sub_zero_design_system 1.1.0

Sub Zero 2.0 is a comprehensive Flutter design system package providing responsive components, themes, tokens, and styles for building beautiful, consistent, and accessible user interfaces.

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

1.1.0 - 2026-02-22

Changed

• Colors: Aligned all color tokens with the official Subzero design system spec
  • Updated action colors: primary (#97144D), secondary (#ED1164), tertiary (#12877F)
  • Updated surface colors: background (#FFFFFF), secondary (#F9F9F9), tertiary (#404040)
  • Updated typography colors: primary (#282828), secondary (#6E6E6E), tertiary (#9D9D9D)
  • Updated support/semantic colors: negative (#EB0000), positive (#278829), warning (#D84008)
  • Updated stroke colors: default (#E2E2E2), active (#404040), selected (#F14687)
  • Replaced hardcoded hex values in toast and tabs components with token references

Added

• New color token classes in tokens.dart:
  • SubzeroActionColors — primary/secondary/tertiary action colors
  • SubzeroSurfaceColors — background surface colors
  • SubzeroTypographyColors — text colors for standard, action, and edge cases
  • SubzeroIconColors — icon colors for standard, action, support, and edge cases
  • SubzeroStrokeColors — border/stroke colors (default, active, disabled, selected, hover)
  • SubzeroOverlayStateColors — overlay, selected, unselected, and disabled states
  • SubzeroNeutralAccentColors — 6 tinted neutral backgrounds
• New properties in SubZeroColors: actionSecondary, actionTertiary, surfaceTertiary, textDisabled, textOnSurface, textTypical, iconDefault, strokeSelected, strokeHover, overlay, selectedHover, visitedLink, neutral1-6, and more
• Tertiary color added to Material 3 ColorScheme in SubZeroTheme

Removed

• Deleted unused lib/theme.dart (unrelated blue-gray palette)

1.0.0 - 2025-01-01

Added

• Initial release of Sub Zero 2.0 Design System
• Design Tokens
  • Color palette with brand, semantic, and neutral colors
  • Typography scale with Inter font family
  • Spacing system based on 8px grid
  • Border radius tokens
  • Elevation/shadow tokens
  • Data visualization color palettes
• Theme
  • SubZeroTheme.lightTheme - Complete Material 3 theme
• Components
  • SubZeroAccordion - Expandable/collapsible sections
  • SubZeroAddItem - Add item action button
  • SubZeroAvatar - User avatar with image/initials
  • SubZeroBadge - Status badges and labels
  • SubZeroBottomSheet - Modal bottom sheets
  • SubZeroButton - Primary, secondary, tertiary, and icon buttons
  • SubZeroCard - Content container cards
  • SubZeroCarousel - Image/content carousel
  • SubZeroCheckbox - Checkbox input
  • SubZeroDialog - Modal dialogs
  • SubZeroDivider - Content dividers
  • SubZeroHeader - Page/section headers
  • SubZeroOnboarding - Onboarding flow screens
  • SubZeroProgressTracker - Step progress indicator
  • SubZeroRadio - Radio button input
  • SubZeroSearch - Search input field
  • SubZeroSlider - Range slider input
  • SubZeroSwitch - Toggle switch
  • SubZeroTabs - Tab navigation
  • SubZeroTag - Categorization tags
  • SubZeroToast - Toast notifications
  • SubZeroToggle - Button group toggle

Security

• WCAG AA compliant color contrasts for accessibility