catholic school

so in 1st yr i dyed my hair pink (dyed it pink againg this summer) but in 1st yr the school made me dye it back cuz it was 'garish' but when i came back after this summer and 90% of it was blonde cuz the pink washed out they told me i 'was almost crossing the line' but now theres a girl with bright red hair in fifth yr and a girl w pink hair in my year and they dont say anything to them, like why do they just pick and choose favorites, if they had given me 2 weeks to get the pink out i wouldve been able to get the pink out using purple hair masks but no, they made me dye it back brown