Temporary Spray In Hair Color (Brunette). Ever want to be a brunette just for a day? Salons are expensive and accenting the color of light or dark hair is usually permanent. Not any more! This temporary spray in hair color can effectively change both very dark or blonde hair in to natural looking, rich brown color. Wear your new medium brown hair around and wash it out at the end of the day! You will be amazed at how natural this brown color looks; you can get salon quality brown hair or brunette accents and streaking right at home for a fraction of the cost AND it washes out in a single wash! The spray produces a rich, natural brown color, when applied properly nobody will know its not natural.