Do you have sample chips? The colours on the screen are quite different to real life. Good that you ditched the $10 as there's not much difference between the $5.
As for 25c vs 50c, pick one. Rarely do people have both - most common is the 25c but sometimes people have 50c when their game is never smaller than 50c/$1. Others will not denominate the fac and use a non-denominated chip so it can be 25c or 50c depending on the day.