Hospital 101 Quiz: How Much Do You Really Know?Share:FacebookPinterestTwitterMailWhich color tube is most often used with EDTA for complete blood count tests?50%Next Correct Incorrect Lavender-top tubes contain EDTA, an anticoagulant used for complete blood count (CBC) tests. Which color tube is most often used with EDTA for complete blood count tests? Green Red Light blue Lavender (purple) 50%