An often made mistake is that users drag a rectangle, filled with a color to the swatches panel, thinking that they added a new color swatch. In reality they created a pattern. Looking at the Swatches panel it is sometimes difficult to see the difference. In the attached example it is impossible to see which of the two green swatches is a color swatch or a pattern swatch. It would be good to have an indicator for pattern swatches, like spot or global color swatches. This is important when users want to to create a new pattern, fill parts of the design with a pattern swatch (thinking it is a color swatch) and get the message that patterns cannot be used in a pattern.