Peg,I'll let you know when I finish doing a "colour" course....
but with a lot of these "weird" therapies... its an intuitive thing.. if you feel they need green / pink/ blue... then use them.......
one book I have suggests, yellow and orange for the intestines and digestive system...... personally I feel that the areas need to be calmed down rather than stimulated so I'd go for a calming colour.....
there are plenty of online "colour healing" sites .. if you do a search you'll find them...
slainte
alison