The “border-radius” property in CSS is used to give a rounded corner to the border of an element. However, it can only be applied to borders with uniform colors and styles. In other words, if a border has different colors or styles on different sides, the border-radius property cannot be used.
Here is an example to illustrate this concept:
This is an element with a border that has different colors on each side. As a result, the border-radius property has no effect, and the corners remain squared.