Does it make sense that Taekwondo clothes are different in color?

Generally speaking. Uniforms are basically white, because white represents purity, and other colors are mainly used for performances. In the official competition (here is the competition, not the quality competition), athletes' uniforms are not allowed to use uniforms other than white, and no advertising materials are allowed. On the contrary, it will be regarded as an act of disrespect for taekwondo, which will make others feel that this person is not a good person and does not deserve to participate in the competition. If it makes sense, white represents holiness, a very sacred color, which represents a person's pure heart and good character. Other colors, on the other hand, have some secular doping, so they can't appear on the big stage.