Wales against Ireland in the Six Nations has traditionally been a battle between red and green.
But on Saturday, Ireland will swap green for white as they look to secure the Triple Crown in Cardiff.
It comes after World Rugby introduced a directive to assist supporters who are affected by colour vision deficiency (CVD) by limiting the amount of kit clashes in the sport.
It can be difficult for those who have CVD, also known as colour blindness, to differentiate between colours, including red and green.
One in 12 men and one in 200 women worldwide are colour blind.
The last time Ireland wore a white jersey was against Tonga, who played in their home red shirt, at the 2023 World Cup in France.
Ireland have defeated England and Scotland in their opening two matches and can win the Triple Crown against Wales, who are winless in 14 matches and will be led by Matt Sherratt after Warren Gatland left his role as head coach.
