Jealousy is:

The intense monochrome of your lovers hand touching his
Burning, boiling,  burtsing, ready to explode
Various reds and deepest violets invade your senses
Causing whatever strength you have left to erode

The heightened passion of his touch on her skin
The colour of her voice as she speaks to him
The distance between your hearts as you leave
All mesh together till your vision fades to green