Do you know your secondary colours from your tertiary colours? Or the difference between a hue and a value? This video is a crash course on colour theory.
Tools to Generate Colour Palettes
Colour palette generators allow you to manually design a palette. If you don’t have a huge knowledge on colour theory, this is probably the better choice.
Basics Behind Colour Theory in Web Designing
Understanding the vast number of options in colour theory available to you as a web designer is important for creating top quality artwork.