In Android development, an image color gradient is a smooth transition between two or more colors. This effect is often used in UI components such as buttons, backgrounds, or as part of animations. Developers can create color gradients using XML or programmatically in Java or Kotlin. Techniques include using the android:gradientBackground attribute in XML, or the GradientDrawable class in code. These gradients can be linear, radial, or sweep, and can be customized with various properties like angle, type, and colors.