Blood samples, color coding of The Tubes

Color coding of The Tubes
Color coding of the tubes for the blood samples:
Questions and answers:
Question 1: What is the purpose of red cap tubes??
Question 2: What is the purpose of yellow cap tube?
All test tube
Would you mind explaining what is your question is?
Please how do I find out diagnostic codes for each blood draw
There are so many sites; one is CDC coding for lab tests. Or you can develop your own codes for each test.