Artistic gradient colors in blue

Quick answer：

Gradient colors in blue are a popular technique in art and design. They involve blending different shades of blue to create a smooth transition, often used to convey depth, emotion, or to highlight specific areas in a composition. In art history, blue gradients have been used by various artists to express different moods and atmospheres, such as the cool, serene tones in Renaissance paintings or the vivid, almost mystical blues in the works of Expressionist artists.