Many years ago I decided that I would copy a particular Simplicio rosette. Above you can see the two options that I had: a light-coloured background or a dark-coloured one. I tend to avoid areas of light-coloured mosaic because the lines between the pieces are more visible. I now have material prepared for 20 or 30 rosettes with a dark background but last week I started having doubts as it looked a bit too dark. However, when I started planing a newly installed rosette this image led to my immediate reconciliation with the design.