A simple Java program which tells about colours

import java.util.*;
class colours
{
public static void main (String arg[])
{
Scanner in=new Scanner (System.in);
int a;
System.out.println ("\n\t The number should be from 12 to 23 ");
System.out.print ("\n\t Enter the number = ");
a=in.nextInt();
if (a==12 || a==13 || a==14)
System.out.println ("\n\t Red Colour ");
else if (a==15 || a==16 || a==17)
System.out.println ("\n\t Black Colour ");
else if (a==18 || a==19 || a==20)
System.out.println ("\n\t Blue Colour ");
else if (a==21 || a==22 || a==23)
System.out.println ("\n\t White Colour ");
else 
System.out.println ("\n\t Out of defined range ");
}
}