Customization is for those who would rather change the preset color scheme of the scent to better match their home. For each scent already has colors choosen such as strawberry is red with a touch of green. If you do not like this you could change it. If you would like to customize your order you can decide which fragrance you would like to see come in a certain color. No matter how big or small your order is there will only be one $1.00 charged to your account you would need to send an email to firstname.lastname@example.org stating details for which order would come in what color.