Change colour of QString

[Morea]

I need help with setting the colour of a string to be green in the beginning and red at the end.
The problem right now is that spaces that occur between the two colours disapear.
The code looks like this:

QString input = .. what ever the user inputs
QString answer = "foo bar";
QString temp="<font color=\"#00FF00\">";
int i=0;
while (i<input.size()&& i<answer.size() && input[i]==answer[i])
{
    temp=temp+input[i];
    i++;
}
temp=temp+"</font><font color=\"#FF0000\">"+answermid(i)+"</font>";

QString input = .. what ever the user inputs
QString answer = "foo bar";
QString temp="<font color=\"#00FF00\">";
int i=0;
while (i<input.size()&& i<answer.size() && input[i]==answer[i])
{
    temp=temp+input[i];
    i++;
}
temp=temp+"</font><font color=\"#FF0000\">"+answermid(i)+"</font>";

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