If you cannot find the color you want, there does have a way to dye the synthetic hair to your own color. But first of all, you'd better order a white or bright blonde wig. Second, you couldn't use the chemicals to do it because the wigs are made of fabric, and the chemicals will corrode the fabric. So the best way for you to dye the wigs is by using a psychical method. Now, let's begin.
(1) Sharpie Markers - Sharpie do provide us with a lot of color choices, you can mix them to adjust the color.
(2) A Knife
(3) 70% Alcohol
(4) A Watering Can
(5) A Pair of Pliers
Step 1: Take out the marker's refill by the pliers, cut it along the pipe, and then put it into the watering can, and pouring some alcohol, shake to mix.
Step 2: Spray evenly to the wig. Remember to put on a pair of gloves to avoid hurting your skin.
Step 3: Air dry for around an hour before washing. Be sure it's totally dry, wait longer if it's not.
Step 4: Wash the wig, use the shampoo you usually use.
Step 5: Put it in a cold and well-ventilated place to air dry.
Here's the before and after look: