In most place you can say "Soy güero(a)". Güero is a Spanish slang for any-kind of light-skinned person.
You could also use the literally translation "Soy blanco/a", but people may not understand what you are trying to say.
"white dress" translates to, "vestido blanco" in Spanish.
you say it in Spanish.
blanco.
blanko
Vino blanco
Spanish for "white fang" is "colmillo blanco". (col-MEE-oh BLAHN-coh)
You can say "La falda blanca".
Te amo, Greg White.
Pelo blanco
No soy blanco
Casa blanca
You say "zapatos tenis blancos".