Blood plasma is a yellowish liquid component of blood that normally holds the Blood Cells in Whole Blood in Suspension. It is the liquid part of the blood that carries cells and proteins throughout the body. It makes up about 55% of the body's total blood volume. It plays a vital role in an intravascular Osmotic effect that keeps electrolyte concentration balanced and protects the body from Infection and other blood disorders.
Source from Wikipedia
So I texted my siblings on this and they all answered that they only have Red blood, not Yellow...LOL
I explained to them that the Yellow blood is actually inside the Red blood. My siblings mostly carry type O and B blood type, so we have no problem on donating to my mum. In fact, some of the blood donated will be used on other patients. According to the doctor, there were six other patients waiting for Yellow blood donation and the hospital blood bank is very low.