12 kinds of gradient color things

Quick answer：

Gradient color things refer to objects or surfaces with a gradual transition of color from one hue to another. This can be found in various artistic, decorative, and practical applications such as paint, textiles, and digital graphics. There are many different types of gradients, including linear, radial, and angular, each with its own unique aesthetic qualities. The term '12 kinds' suggests a specific categorization of gradient color effects, but without further context, it's difficult to provide specific examples or details.