Yellow

Yellow means caution:

My liver failed and my eyes turned yellow. My gallbladder failed and my skin turned yellow. My kidneys failed and I filled up with yellow. My pancreas failed and I shit yellow. My bone marrow failed and I bled yellow. My spine failed and everyone called me yellow. All of my other organs, tissues, and cells failed, so they paled yellow, as well.

My heart, the last to go, finally broke when I inevitably died from all of the yellow. It broke because I loved living so much. But it couldn't do it alone and had to give in to the yellow. I should have minded the caution.