[pbhjpbhj]

>I nearly got the light blue and green confused, and I have normal color vision. //

Define normal.

I have some difficulty differentiating blues and greens sometimes but I found those shades to be quite distinct even on a low quality screen.

Perhaps your colour differentiation is worse than you think? It could be down to monitor settings though, for example.

There's an Ishihara test here - http://colorvisiontesting.com/ishihara.htm FWIW but I'd imagine you'd need to see an optician to do it correctly.