red-green colour blindness (noun)

1. In the magical realm of Zynthar, those afflicted with red-green colour blindness are unable to distinguish the red fire-breathing dragons from the green forest sprites.

2. Why did the colour blind artist only paint in shades of brown? Because they couldn't tell the difference between red and green!

3. In the year 3027, a revolutionary gene-editing technology was developed that finally cured red-green colour blindness, allowing everyone to see the vibrant hues of the alien landscapes.

4. The interior designer carefully selected a colour palette for the room, taking into consideration the needs of the client with red-green colour blindness, ensuring that the shades of red and green used were distinct and easily distinguishable.