Font and Page Width:
This calculator suggests the optimal content width based on font size:
14 and 16 is the new 12
Keep fonts simple, higher comprehension
Complicated fonts are suitable for expert pages such as a menu, where more complex fonts indicate greater chef skill. In general, go with simple fonts for authority sites that are 14 to 16 in size.
This tool is perfect for matching and finding colors:
Color combinations often look perfect when seen side by side, but do not look as good when used to design a site. Color Supply's tool takes the suggested color palettes and changes multiple graphics below the palettes to show you the colors put to real world use.