JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>

<div id="app">
  <li v-for="item in notes"
       :style="{background:item.color , color:'white' , 'font-weight':'bold'}"
   >
    {{item.title}} : {{item.content}}
  </li>
</div>

CSS

li{
  border-radius:10px;
  margin-bottom:10px;
  padding:10px;
}

JavaScript

const { createApp } = Vue

  createApp({
    data() {
      return {
        notes: [
          {
            title: "春節行程安排",
            content: "吃飽睡，睡飽吃",
            color: "red",
          },
          {
            title: "工作待辦事項",
            content: "詢問各家廠商報價",
            color: "green",
          },
          {
            title: "運動健身計畫",
            content: "每天早上六點去健身",
            color: "blue",
          },
        ]
      }
    },
    mounted() {
      this.notes[0].content = "多出門、到處走走、也要多運動"
    },
  }).mount('#app')