One of the tricky things in web design is picking the right colours. They need to be easy to read, not grim, not flashy, yet somehow distinctive. Often, taking a stab in the dark and then tweaking a screenshot of the result for saturation, contrast, and the like can be very effective. At other times, you need a starting point.

These have all helped me:

• Tango palette
• Web 2.0 palette
• Category:Colours on Wikipedia includes shades of Orange, Green, and so on
• ColourJack Sphere is a useful widget for finding matching colours
• Colour Lovers features user-submitted colours and palettes