Mazda6 gradually changing black to blue

Quick answer：

The 'Mazda6 gradually changing black to blue' refers to a special paint finish technique used on the Mazda6 car model. This technique involves applying multiple layers of paint with varying shades of black, which then gradually transition to a blue color. This creates a unique visual effect that changes with the angle of light. This type of paint finish is often used to add a distinctive aesthetic to vehicles.