STATIC WINDOW CLINGS start out clear, but can also be printed in solid background colors. They adhere to the INSIDE of car windows without any adhesive. They are also known as static cling ons and are sometimes called decals. They are easy to remove and can be reapplied to clean surfaces. For best readability, we recommend light imprint colors. They are not visible through dark tinted windows, so we suggest that they are used on clear windows. We recommend a white imprint or light imprint color with a contrasting color. This then will be a 2 color imprint as white is counted as a color. Printed in high-glossy colors. Made in the USA!