I wrote you the good pseudo class syntax and it seems that you didn’t do any tests to figure out what is the issue.
Good syntax (course example):
a:hover {
color: red;
}
Your code:
a: hover{
color: blue;}
You don’t see anything different between these two syntaxes? Since when, for example, is there space between “:” and “hover”? Did you see any spaces on the class example?
Many similar questions to guide you. You have all the answers in the class seriously talking. You almost have it!