Light blue roses, while not naturally occurring in nature, can be created through a process of dyeing or tinting white roses.
These tinted roses are often used for special occasions and can add a unique and whimsical touch to floral arrangements.
 
Altering roses, such as dyeing or tinting them to achieve a different color, can indeed affect their lifespan. The process of altering the roses, whether through dyeing, painting, or any other method, can introduce substances or interfere with the natural processes of the flowers, leading to a shorter vase life.