Salesforce: Dynamically Assign the style in the Visualforce page

//CSS Style

 .red {

            background-color: red;

        }

        .green {

            background-color: green;

        }

        .yellow {

            background-color: green;

        }

     
//VF Page code

    <apex:pageBlockTable value="{!recordList}" var="record">

        <apex:column styleClass="{!record.colorCode}" headerValue="Created Date">

           {!record.createdDate}

        </apex:column>

    </apex:pageBlockTable>

     

//Apex Class to get the values

      public List<accountRecord> recordList {get; set;}
    public void getAccount() { 
        recordList = new List<accountRecord>();
        for(Account record:[SELECT CreatedDate FROM Account]) {         
            String colorCode = (record.CreatedDate>System.Now().addDays(-3))?'green':(record.CreatedDate>System.Now().addDays(-5))?'yellow':'red';
            recordList.add(new accountRecord(record.CreatedDate,colorCode));
        }
    }
    public class accountRecord {
        public DateTime createdDate { get; set; }
        public String colorCode { get; set; }
        public accountRecord(DateTime submittedDate, String colorCode) {
            this.submittedDate = submittedDate;  
            this.colorCode = colorCode;
        } 
    }