So I've seen that the yellow causes eyestrain for some ppl and I was wondering if ALL yellow does that or if we would still be able to include the yellow by using a more pastel variant that is less bright and vibrant?
This really isn't the place to be asking about this, though I can say what I know. Yellow in general is used as a happy color, yet also for caution because of how stimulating/alarming the color is. For some, bright colors like yellow are over stimulating, and overuse of those colors can make it very difficult and even painful for those viewers.
A little bit of yellow may be okay, though the idea behind removing yellow from the arospec pride colors was to make sure people don't use too much of it when it could hurt others.
This is not something I know for sure so please don't take my word for it, I suggest looking around for yourself. The comment on the post about the flag design is where we got the information that the yellow was harmful to usein the flag/colors.