For frizz and dryness after coloring, here are some tips to help you restore softness and shine to your hair:

1. Use a color-protecting shampoo: Choose a restorative shampoo and conditioner that targets damaged hair after coloring, as they often contain nourishing ingredients that can effectively reduce the damage caused by chemical coloring.

2. Regular Deep Treatment: Once or twice a week, apply a deep nourishing hair mask to replenish lost nutrients and enhance hair elasticity and shine.

3. Gentle combing: Use a wide-toothed comb or a specialized wet comb and avoid pulling too hard, especially when the hair is wet, to avoid additional damage.

4. Control heat treatment: Minimize the use of high-temperature tools such as hair dryers, perms, curling irons, or apply a heat shield spray before use to protect your hair from heat damage.

5.Moisturizing and hydrating: Regularly do hair hydration and moisturizing work, you can use hair oil appropriately, and apply it when the towel is semi-dry after shampooing to help lock in moisture and keep hair soft.

6.Trim split ends regularly: Trim split ends in time to keep your hair looking healthier overall and help with nutrient absorption.

7.Diet: Replenish the nutrients needed by the hair from the inside, eat more foods rich in protein, vitamin E, B vitamins, iron, zinc and other minerals to promote healthy hair growth.

8.Avoid overwashing: Frequent hair washing can deprive your hair of its natural oils, so it's recommended to adjust the frequency of shampooing to suit your condition and rinse your hair with lukewarm rather than hot water.

With these treatments, your coloured hair will gradually regain its original suppleness and shine.