Most men in the Philippines will choose free love and marry the girl they like. Therefore, in the process of pursuing girls, you will think twice before you act, and there will be such incomprehensible taboos. Filipinos generally think that red and brown are not very good, but they will avoid such colors when choosing flowers.
In fact, they are not really jealous of these two colors. After all, the Philippine flag has a red part. If it is really taboo, then why take it out and put it on the national flag? Although the red part of the national flag represents courage, it does show that Filipinos don't hate red, and brown can naturally be compared to the result.
And the color of tea is not all brown, and some are other colors. I believe that no one will choose tea such as black tea when they know that they don't like brown. Moreover, most people in the Philippines are very polite, and even if they are unhappy, they will not be obvious unless the other party hurts them too directly.
I think the most important thing is that the tea in China is really delicious. There must be many Filipinos who like drinking tea, so color taboos will be limited. After all, Filipinos themselves have never said no to brown, and the taboo of sending flowers is only a situation that the woman may not like.
One of my oral English teachers used to be Filipino, and he didn't seem to have any particularly annoying colors. For example, when we are in class, people often bring glass tea bottles into the classroom without being criticized or reminded by the teacher. So if this brown color is really taboo, it will vary from person to person.