Removing hair colour from your eyebrows is really the same as removing it from your hair. However, because eyebrow hair is coarser, it may require more than one treatment to remove as much colour from your eyebrows as you wish. Hair colour added to eyebrows will eventually fade out, if you are patient. But if you absolutely must get some colour out of your eyebrows, simply be careful and follow all instructions that come with your product.
Use a colour correcting product, such as Colour Corrector. There are many similar products for removing hair colour. These products generally have similar instructions.
Mix the two bottles of ingredients provided by your colour correcting product. Typically, you mix the quantities in a one to one ratio, so you can just use a portion of the bottles as you won't need all of it for just your eyebrows.
Apply the mix onto your eyebrows using a Q-tip. Leave it on according to the directions with your product. Typically, this will be for about 20 minutes.
Wipe off the colour correcting mix using a tissue or cloth, then wash your eyebrows. If enough colour has not been removed, repeat the process.
Alternatively, remove all colour from your eyebrows by bleaching them. This will result in white-ish blond eyebrows. Simply mix a small amount of bleach with a small amount of creme developer (used for colouring hair.) You won't need much as you're only doing your eyebrows. Apply with a Q-tip, leave it on for 20 minutes as you would with the colour corrector, then wipe and wash.
Always when colouring or de-colouring your eyebrows, be extremely careful not to get anything into your eyes as this can cause permanent damage.