I've made 2 bargellos- you have done a great job picking your fabrics. While I agree on how your 2 lightest and 2 darks read,this, if the placement is right give you a "whitecap" effect and the 2 darkest can give the deeper water effect. I do agree you may have some issues with 15-17 #16 may play better moved to the greens, but a monitor view can be inaccurate so you will make the right placement. Take your time, stay very organized, some system of labeling is crucial, as is starching, starching, starching :-) enjoy the process! Looking forward to your pictures.