[quote=@Blueflame]
<Snipped quote by Vishtaspa>
 I just realized that it won't make words. Nooooooooooooo

[/quote]

Team One is DCKS. This can be Docks or Ducks, both of which give the impression of blue waters.
Team Two is... difficult. See below for idea spitballing.
Team Three is SAAZ. Saaz is a type of hop used in Bohemian beers, thus giving the impression of an earthy brown color.

So for Team Two, most words are going to be even more of a stretch than usual. Here are a few, using both first and last names:
FEMS > Females > pink
MESI > Messy > every color in a splatter painting
MESS > see above
EMFS > Electro Magnetic Fields > yellow
VIMF > Vine > green

EDIT: I rather like Vishtaspa's ideas as well.