About the patterns ... let google be your friend!
There are so many possibilities out there.
As for the yellow ......... if you don't like the colour, maybe just set the jelly roll set aside and don't use it at all.
Or as already suggested you can always substitute. But I'm guessing there may be too many yellows in there to substitute. Then, just set the whole thing aside.
Life is too short to work with something you do not like ... and will not enjoy the process, as a result!