Shilpa Joshi Halder, Senior Scientist - Hair Color & Care Development Manager South Asia at L'Oreal India Pvt. Ltd, shares a useful tip to keep in mind before you go through any hair colour process, “It’s a good practice to always do a quick allergy test before you start with your hair colour. Do this, 24 hours before, by swabbing a small amount of hair colour behind your ear. Wait at least 2 weeks after bleaching, a perm or a straightening process before applying this colorant.” Here are a few colour suggestions L'Oreal thinks you try a trend this summer: