Sometimes all the colors of the rainbow are just a little too much and you just need a hint of rainbow without all the garishness. Tone it down a little.
Have you started stuffing your face with corned beef and cabbage yet? Are you 4 Guinnesses deep? Have you been pinched or kissed? Go crazy, dye the river green, gorge on Irish cheddar and remember to drink lots of water and take some ibuprofen before bed.