Three.js gradient color

Quick answer：

Three.js is a JavaScript library used for 3D graphics in web browsers. A gradient color in Three.js refers to a smooth transition between two or more colors, often used for materials or textures. To create a gradient color in Three.js, you would typically use the `THREE.Color` and `THREE.LinearGradientMaterial` classes. This material can then be applied to a geometry to create a visually appealing gradient effect on the 3D object.