When I do my clones... I do my cuts and place them in PH 6.6 water right away so the cut part does not start to heal its self. Then I put them in a dark place for about three days. This helps the plant with the shock of being cut. When a new clone is placed under harsh light it is not working on the rooting. After bringing them back out of the dark space, place them in to the rockwool, rapid rooters or seedling soil. I learned not to place the clones under harsh light. I use T8'swhen u colon a plant do they wilt a little before they start growing roots
The wilting could be from to much light and the turning color could be to much water. If they are drenched with water they wont grow roots very fast because they don't have to send out feelers.
Remember that your clone has been taken from a mature plant with nutrition and that nutrition has been cut off. Some plants are just really hard to clone and others are really easy. Every grower has a method that works for them. You just have to find your Oooo that works for you. Some times it is a little from here and a little from there that makes you go I DID IT!!! I hope this helps
PS if they start to wilt don't give up on it. I had one shrivel up to almost nothing and I babied it and after about a month it started to grow and turned out to be a really good plant.