In Illustrator you can create own colors in the color palette (as you might know :)). Now I want to do the following: create a shape, for example a rectangle, and assign a color from the palette. Is it possible to change the color of every shape I assigned the color the when I change the color in the palette? For example I create a color "myColor", assign it to three rectangles and when I change the "myColor" in the palette, all the three rectangles are updated automatically. Thank you!
When you create the new swatch, check the Global checkbox in the New Swatch dialog. Any change you make to the swatch will then replicate anywhere you use it.