There are currently several colour themes available for the forum, examples of each are given below. For details of how to change your colour theme please see HERE
Vibrant (Violet, Purple, Cyan) - the forums standard theme
Blues and Cyan
Triad (Pink, Yellow, Cyan)
Brighter (Red, Green, Cyan)
Greens and Cyan
Greys with Colour Accents
Simpler Old Blue Theme (This is the original simple blue theme that the forum had until recently)