green-portal vein, splenic vein, SMV

dark blue-IVC, renal veins

red-aorta, renal arteries

orange-celiac, arising as two separate vessels, common hepatic and splenic artery

yellow-kidneys, renal pelves

purple-SMA

aqua-IMA

IV contast was given, as the aorta is whiter than muscle.

This is an axial CT in soft tissue windows.