Blood Colour?

An unusual question I am sure, but I just this minute had two blood sample taken in four days. The first my blood seem watery and a night light red colour, and my most recent blood sample seem to be thick and shadows red almost black in colour.
The first taster seems slickly taken, but today it seemed to bring much longer to get duplicate quantity of blood, and since this my arm is aching and achy.
The question is can anthing be told by the colour of blood? Is at hand anything I should be concerned about?Blood Colour?
Sounds close to you were dried out today, try drinking more next time.
The color depended on if they took it from an artery or artery
Artery - bright red, fills at full tilt
Vein - Dark red, fills slowly
ask the doctor comrade.
Sounds like we could be paid black pudding out of the last lot of blood they took. Don't verbs..blood is lighter when oxygenated. your last blood token sounds like it be all out of oxygen (on its road back to the lungs for a top up).
Depending on from where on earth the sample be drawn, yes, it is possible to get different colored blood sample. Venous blood is darker because of the carbon dioxide it is carrying. Freshly oxygenated blood is bright red and flows through arteries.
Discuss near your health professional, your concerns nearly the color and viscosity changes and the distress in your arm.