A White Happy Birthday Poster is a decorative piece of paper or card that is designed to commemorate a person's birthday. Typically, it will feature a message of congratulations or well wishes, along with images or illustrations that are related to the occasion. The color white is often associated with purity, innocence, and new beginnings, making it an appropriate choice for a poster that celebrates the beginning of another year of life. White is also a versatile color, meaning it can be combined with various other colors and designs to create a unique and personalized poster that is perfect for any birthday celebration.