colors suitable for gradients

Quick answer：

Colors suitable for gradients are typically those that transition smoothly from one hue to another. This is often achieved with a combination of analogous colors (colors next to each other on the color wheel), complementary colors (colors opposite each other on the color wheel), or a gradient of shades and tints of a single color. The goal is to create a visually pleasing and harmonious transition that can enhance the overall design or artistic piece.