99 ($3.50/fl oz) $14.99 $14.99. Get blue hair dye for dark hair store information. blue hair, dark, dyed, electric, grunge, love, purple hair 10 blue highlights on brown hair you’ll see trending in 2020. Royal blue hair dye . See more ideas about blue hair, hair, wig hairstyles. Before you dye your hair blue, it is important to lighten it as much as possible so that the dye will take. Stargazer royal blue conditioning semi permanent hair dye, vegan cruelty free direct application hair colour 3.8 out of 5 stars 3,220 £5.00 £ 5. If you happen to have dark hair, it’s impossible to dye in a dark blue black or navy blue shade with no bleach. Royal henna is ' henna ' based hair dye in powder form. You might be tempted to go to a hair specialist to process your hair, but a single visit can cost you anywhere between $60 to $500+. While there are many colors to choose from, purple hair dye is a great option if you want to transform your hair. As for light or blond...