I use white chalk to mark on medium to dark fabrics. Coloured chalks can be difficult to remove. There are many different methods for marking a quilt pattern.
1. Put a fabric on the back with a nice design and quilt from the back following the fabric design.
2.Golden Thread paper is meant to be stitched through and removed after quilting.
3.Quilt an all over design that doesn’t need to be marked.
4. Use ruler foot and rulers to do designs.
5. Some QB members like Crayola washable markers.
6.An old method was to use white soap slivers to mark a top etc....