Planning- Change of costume ideas for Romy, why?

At the beginning we decided to start off with colourless to pale to bright colours to see how her character evolves. Sort of going along with the lyrics. She becomes stronger and more confident in her herself and finally finds another boy. However Romy doesn't have much bright colourful clothes and neither does Khadeeja and when Romy tried on all my colourful clothes it somehow didn't look right, it also depends on the body type and how it fits her. Therefore we changed it up a bit to start off with colourless, to maturing in clothes for e.g. at the end she's wearing a crop top (showing a bit more flesh) so the audience follows her development as a character.