blue-IVC and iliac veins

red-aorta and iliac arteries

purple-stomach and duodenum

green-uterus and vagina

yellow-left kidney and bladder

orange-rectum and sigmoid

This is a CT reformatted in the sagittal plane, with both oral and IV contrast. Look for bowel loops with contents that are whiter than muscle. Look for blood vessels that are whiter than muscle.