Hey there! I did try to keep in mind that some people would be colourblind and cannot see the difference between hues as much. That's why I added a hidden element to the colours; they're all grouped into base colours and they're the ones you start out with (with the exception of brown, I believe). Purchasing more colours is pretty much optional.
So you don't need to find the exact shade of yellow, because all dark/light yellows are grouped as 'yellow'.
Of course, if a client generates an orange dress with a red pattern, it would probably be hard to see for you. I can try and exclude the colour orange from ever being used in a random client if this would help out.
Eventually Tailor Tales will be released with a premium option; it will have adult content along with the fact that you start out with all the items and all chapters unlocked so you don't need to grind for money. Of course, the premium version will cost money, but it would probably work out for you since you just want to enjoy the story without all the hassle :)