Blue gray smog blue gradient color

Quick answer：

The term 'blue gray smog blue gradient color' refers to a color scheme that transitions from a blue-gray hue, which is often associated with smog, to a solid blue color. In graphic design and art, a gradient is a smooth transition from one color to another, and this description implies a visual effect that starts with a smoggy blue-gray and gradually changes to a clear blue. This type of color scheme can be used to represent the progression from a polluted to a cleaner environment.