Hi

if you want something OOTB you can use button and add icon to the button with empty text. In the presentation tab, choose control format as Icon. Which will give you blue colored icons.

If you want to use image control with icon class as reference, I think you need to add custom css in your skin.

First add a class Ex: "my_icons" in the advanced presentation tab as below

In the skin add custom css with following styles

.my_icons{
  color: blue;
}

 You will then be able to see blue color icons.

you can reuse same class wherever needed 😃.