1 Horiz

import 'package:flutter/material.dart';
import 'package:gap/gap.dart';

final legends = [
  {
    'label': '2021',
    'color': Colors.blue,
  },
  {
    'label': '2022',
    'color': Colors.purple,
  },
  {
    'label': '2023',
    'color': Colors.orange,
  },
  {
    'label': '2024',
    'color': Colors.green,
  },
];

Row(
  children: List.generate(legends.length, (index) {
    final legend = legends[index];
    return Padding(
      padding: EdgeInsets.only(left: index == 0 ? 0 : 20),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          SizedBox(
            height: 16,
            width: 16,
            child: Material(
              color: legend['color'] as Color,
              shape: const CircleBorder(),
            ),
          ),
          const Gap(10),
          Text(
            legend['label'] as String,
            style: const TextStyle(
              fontWeight: FontWeight.w400,
              fontSize: 14,
            ),
          ),
        ],
      ),
    );
  }),
),