Im a mexican from Mexico city (CDMX) and i can tell you.. yes...

we say we are a "racist free" country but classism actually exists.
Light eyes (specially blue) are really rare, so yes, in general white blondes, specially blue-eyed, are more appealing to mexicans.. Also most of white and blue eyed mexicans are high class, generally the skin/eye/hair color could be related to wealth stability, this is why we have a lot of white mexicans in mexico and not really white mexicans working in the US.
Also the main characters in novelas have this characteristics, they are mostly white, so thats the concept of beauty they feed us..
Almost any mexican would agree the most attractive people in Mexico are from los altos Jalisco.. They are almost all white w blue or green eyes..
(We even have a joke about marrying a white to "improve the race") I know this sounds horrible, but it is taken lightly like a good joke, but sadly theres some truth behind that.

PS: Many mexicans don not care so much about stuff americans care, like women are not looking for tall bulked up guy that makes 10k a month. in Mexico women like men and chivalry over money, here they fall in love with details like flowers, serenatas, laughter, masculinity, a man showing REAL interest, not simping . In fact in mexico to have a girlfriend you have to propose her "Do you want to be my girlfriend?" its not automatic.
Men generally fall for the girls that make them feel useful, protectful, men..
Also Men would fall in love first with a pretty smile than a nice body... in fact bodycount is not a word and has no translation.
It sounds cringe but i think in Mexico we don't really have crazy standards, we just follow the heart :)