Hi, I had a blood test earlier today at 11:00am for

Patient

Q: Hi,
I had a blood test earlier today at 11:00am for my dermatology checkup, and before I was heading to sleep, I noticed that my three fingers on my hand have a grayish/bluish color. The color covers around 1/4 of my fingerprints and is only at the tip. I have tried washing it off, and scrubbing it hard, but the color won't go away. I feel normal, no pain or symptoms, and my fingers feel fine. Is this something to worry about?
Thanks.

Symptoms:  None
Images: 
Hi,  I had a blood test ear...-1
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