It sounds like you're describing a fashion accessory - a sky blue belt designed to complement jeans. This combination could create a stylish and vibrant look, particularly if the jeans are a classic denim blue. The sky blue color adds a pop of brightness and can add interest to a casual outfit. Pairing it with a white or neutral-colored top could further enhance the overall look by allowing the belt to stand out. Additionally, accessories such as silver or gold jewelry could complement the outfit nicely. Overall, it's a versatile and trendy choice for those looking to add a splash of color to their wardrobe.