From red to purple gradient

Quick answer：

A gradient from red to purple is a smooth transition of color from red at one end to purple at the other. It is commonly used in art, design, and digital media to create a sense of depth or transition. In computer graphics, gradients are often used to fill shapes or backgrounds. In art, artists may use a gradient to transition between colors on a painting or canvas. The color spectrum transitions through various hues as it moves from red to purple, including crimson, pink, magenta, and violet.