Hey guys,I’d like to share the way to express the bright fluorescent colors in CLO.

1. Choose the most saturated color in your fabric's most suitable color, but be slightly darker than the color you need.
     
   
   
   
2. Choose the render, then change the light intensity from 1.00 to 3.00.
   
3. Then it will become the color you want.

Btw, if you want to maintain the original color in other parts of the garment, you can darken the color or navigate to the fabric of these parts → Property Editor → Material → Type → Reflection Intensity then lower the value.