How long have you had your ileostomy? Do you think that you are still just adjusting to pressing in on that area to attach your pouch to your flange?
If you have a blockage from adhesions, you will definitely know it. Adhesions alone should not make the area around your stoma look bruised. I will have to say that I have had several "partial" blockages over the many years I have had my ileostomy but none that have required surgical intervention, thank goodness. Once in a while after I have a blockage, I too notice that the are around the stoma actually looks bruised, but I certainly can see why it would on me. If you have not had any pain, you may want to check with your ET. I just can't think of any reason your skin would discolor for no apparent reason. Sorry I can't be of more help.
Diagnosed with CD in 1979, many resections and meds
Perm Ileostomy July 1984 at Cleveland Clinic
Disease free since surgery