Guera just means a lighter Mexican Female a lighter Mexican male would be guero.If some1 has lighter skin, hair, eyes etc.
However,
gringa means some1 who is white non-hispanic,
guera is just used for someone who is just lighter.
1st person:Ay is she a
gringa?
2nd person:Na shes just a
guera
1st person:ah shes just lighter,
horale.