A must have for every maker's craft station is the DMC Threaded Colour Card.  This card has actual threads included.
 
Selecting the perfect colour palette is never easy, but having true color skein samples of DMC's wide variety certainly helps. 
 
With this colour card you can preview 485 solid, and 18 variegated, DMC Six-strand Embroidery Floss colours. 
 
Plus, preview the colour range for Pearl Cotton solids and metallic, Light Effects, and colour variations.