Shocking™ Blue book Check out their appearance in

Check out their appearance in the 1982 horror film Alone in the Dark

We recommend lightening hair to a very light level 9 blonde before use

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Pastels/Greys/Toners contain less pigment than our vivid shades and will fade from your hair faster

Shocking™ Blue book Check out their appearance inGUILT FREE GLAMOUR! Shocking 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 colors 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