I suppose 'white' works when the context makes it clear you're referring to race or ethnicity, but when you're speaking of mythology and fantasy, it doesn't. It could easily be taken literally.
Here are four 'white' women. Two are 'regular' people, while two of them are actresses portraying fictional characters.
Then you have albino people, who can be of any race. The last woman is of Asian ethnicity.
To remove ambiguity, I suggest you describe your fairies as something like 'fair skinned and light haired'. If you want them to be blonde, call them 'flaxen haired', if you're thinking of them as looking like the St. Pauli girl logo.