Classic Shocking Blue Red perform a strand test to

perform a strand test to check your results

with its deep blood-like formula and orange undertones

earthy tones

Semi-Permanent hair colour

This colour may add green highlights to virgin

Classic Shocking Blue Red perform a strand test toShocking Blue is a dark cobalt blue hair dye. For best results, we recommend lightening hair to a very light cool toned level 9 blonde or lighter. All semi permanent blue hair colours can interact with yellow tones in bleached hair to create a green tint so make sure to do a strand test prior to applying all over to ensure you get the results you want! If you'd like to avoid a possible green undertone, you can add in a purple shade like Purple Haze to