The yellow is highlighter quality; the other colors (pink, blue, green, and orange) are bright and (forgive the pun) sharp

It is a great neon pink color that works very nicely on white objects.

I like the hot pink and hot orange

These are very bright pink

The pink is AMAZING, the orange is pretty cool and the yellow is just ok but the blue is absolutely ridiculous

But really fun for black light activities - I plan on using them to personalize some stuff for a 'glow run' 5K later this year.