Meanwhile, light blue seemed to have its moment in the last week or two, judging by the German Burda's choices pictured here and the Guardian newspaper's fashion page below. And blue is my favorite color.
IKEA's cheapo cotton is practically free, but it is heavier than the white batiste I used for the first version. This is more a sort of chambray that softens with washing and is good for a Swiss summer evening over a swimsuit by the lake.
I cut only the needed length of 'natural' colored cotton off my IKEA stash and washed it with 'whitening' detergent so that I had as white as possible a base for the dye to grab hold of, then ran it through the machine with a box of blue dye. Total cost for a sturdy shirt, less than ten bucks.