Message: Only named colors can be spot colors
Cause
You have tried to make a local color a spot color. Only named colors can be spot colors. If you want to make a local color into a spot color, then it must first be given a name.
What Can I Do?
 To create a named spot color, 
 click Make Named. Xara LX will 
 automatically turn this local color into a named spot color for you. You 
 will be asked for a name for the new color.
 To create a named spot color, 
 click Make Named. Xara LX will 
 automatically turn this local color into a named spot color for you. You 
 will be asked for a name for the new color.
 To leave the color as it 
 was, click Cancel.
 To leave the color as it 
 was, click Cancel.