Speckled top
red top
You tube has plenty beginners drawing videos. If you want to learn from proven professionals check local library for artist info or Udemy courses.
black
blue
To indicate a presence of free residual oxygen.
SST or gel separator tube
Red sst
Red
Green tube which contains the anticoagulant Heparin is ideal for electrolyte testing.
speckled top tube
SST
Sst
Green top tube
Type your answer here... green tube
green
pink
Sst