Agree with "avoid colours" because of the stain risks!
I've never had luck with any of the pencil crayon style chalks.
They've always seemed to break more than stay together!!
Depending on what type of marking I do, my white choices are below.
All disappear or mostly so, by the time I have finished the quilting.
* For straight line markings against a ruler ....
Clover 4712 Pen Style Chaco Liner White : Amazon.ca: Home
* A finer point than traditional chalk, for freehand or against a ruler. However, it dulls and if a fine line is needed, regular re-sharpening is required. (I only use the white in these refills) .....
Dritz 3095 Quilting Chalk Cartridge Set : Amazon.ca: Home
* A nice sharp line whether freehand or against a ruler. In most cases, my first choice! ....
Dritz 7757 Fons and Porter Mechanical Fabric Pencil, White : Amazon.ca: Home
*****Disclaimer***** I am not recommending Amazon because of these links.
Just an easy place to give you info and photos.