A family of Microsoft word processing software products for creating web, email, and print documents.
There was no 'standard' palette across all the applications in Word 2000, so it's difficult to know what you are missing, but it is true that the way colours are presented changed in 2007 and there is no easy way back.
The colours you see do depend on the Theme (new Office 2007 Theme, not related to earlier Word Themes) you are using but a change of Theme alone will not give you what you want - in fact, nothing will. PowerPoint MVP Echo Swinford describes a way to add custom colors to a Theme here: http://www.echosvoice.com/2007/customcolors1.htm but it doesn't show up everywhere in Office.
I have written quite a bit about colours in Word, primarily the use of them in VBA. If that is of interest, seehttp://www.wordarticles.com/Articles/Colours/2007.htm
Enjoy,
Tony