Last time I checked children bully each other over their clothes and form sub-groups based on them. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3513287/ https

Last time I checked children bully each other over their clothes and form sub-groups based on them. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3513287/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3513287/ It likely also depends on how prominent the color coding is. Just a marker would probably be too abstract for children to be factored in. But I'd question your claim if children are clad differently in an obvious fashion like different shirt colors f.x.