I just had my breast utz and the doctor who's in charge said that the tumor was a bit darker than the color of my breast should i be worried?

Breast mass: That is is darker on ultrasound usually means it is less dense that the tissue around it. That is usually a good thing to see on ultrasound of the breast. Please be sure to follow your doctor recommendations for following this. Hope this helps. Good luck.

Possibly: If you are talking about a mammogram, calcification could suggest the possibility of cancer. I would check with your doctor or the radiologist.

Breast lesion: It sounds like you had an ultrasound. Nearly every breast lesion, benign or malignant, will look "darker" than normal breast tissue on ultrasound, so in and of itself this doesn't mean much. There are other sonographic features of a mass, such as the shape and characteristics of the borders, that help determine whether it is suspicious or not. So, can't tell if it is worrisome without more info.