Pastel Blue is a light blue color. It is a pale blue color that is usually very soft and delicate in appearance. It can be described as a gentle blue color that often has a slight pink undertone to it. This makes it a perfect color for use in feminine designs, as it can add a touch of sweetness and femininity to them. Pastel Blue is also often used in baby designs and products, as it is considered to be a calming and soothing color.