bleach the red dye out.
Add white to the red.
bleech it
It is not known what school has a uniform of a red plaid skirt and a white shirt. While some schools require uniforms most schools do not.
Just use a dye
Red food dye..
red black and white
Put it in the dryer with something red
it mainly reflects red, absorbs green + blue
Where did you get that red dye always kills plants? I had a friend who grew some white flowers in red die and they just turned pink, they didn't die. But what they were in was not completely dye, it had water mixed in with it too.
It is a long black skirt with yellow, blue, and red at the bottom and a fancy white shirt that you CAN tuck in your skirt depending on what shirt you have.
It would look ok but not the best I would wear the yellow skirt with a neutral color like white