Black pansies

I spotted these last night in the school horticultural plots. They have survived all on their own all holidays.They had been planted from seed the students had sown and were part of a pattern of the peace sign with white pansies.

I picked a small bunch and brought home thinking I might blip them indoors. This morning however I decided to go back and get them in situ but no sun so they weren't fully opened. A grey day with little likelihood of sun now so I have taken them sitting on opaque silver card by a window.I see one has the remains of my spraying water on them but all the other drops have dried up.