It's a theme that has more implications than just the visual appearance in japanese culture. And it has been very confusing to me to find out that there is no tag for this ... ??? You could also call it "tanned". I have neither found any kind of tag for this, nor has any image portraying a tanned person a corresponding tag.
Very weird.

The only body type tag yande.re keeps is loli for censoring purposes.
And trap and male I guess.