Here's how I broke down my color palette for this illustration:
- The color of the background paper
- A dark color for the shadows
- Text and outlines
- A bright color for catching the eye
Draw three boxes using the Rectangle Tool. Select one box and pick out a color using the Eyedropper Tool.
Repeat this for the other colors in the poster so you will have 3 boxes of different color
Select these 3 boxes with the Selection Tool (Command+V) and select the New Color Group folder icon in the Swatches window
You will get a pop-up and click on “Convert process to Global.”
You should get a row of your new colors in the swatches menu with a little white triangle in the corner.
This means that you can change them at any time (just double click on the box) and they will change automatically in the preview window.
So, if you wanted to change all the strokes and fills from red to blue, you would just double click on the red swatch and move the CMYK arrows to the desired color.