Dear child,
Being told that it's okay to be white means that it's okay to be the color white, just like it's okay to be any other color. People come in lots of different colors, just like a rainbow. Some people might have brown skin, or black skin, or even green skin (but only in movies!). And every color is beautiful.
You might hear people saying that it's not okay to be white or that white people are bad. But that's not true. People should be treated with respect no matter what color their skin is. We should love and accept everyone for who they are, no matter what they look like.
So, remember that it's okay to be white, just like it's okay to be any color. And always treat others with kindness and respect.