TIP - when searching for a color by the shade number. Use "Shade 25" for example in search box, that will bring up both Acrylic and Enamel color if available.
The current Humbrol Color chart is available for download at http://www.hornbyamerica.com/pdf/Humbrol_Color_Chart_2010.pdf
Copy and paste the link into your browser
Humbrol Paints by Category