[Origami] What is current status on the color of mountain vs valley crease lines

Hi,what is the currently accepted convention on showing mountain vs valley crease lines?  Are we using red lines to indicate mountain folds and a blue line to represent valley folds? thank you, Diana

[Origami] What to call a diagonal pleat fold eg. nautilus

Hi,do you still call a fold a "pleat fold" if the folds are on the diagonal instead of exactly parallel to each other?  For example in the origami nautilus. Example:1) start with a 4"x4" paper  2) Fold into quarters, divide the paper into 4 sections of size 1"x4" 3) turn paper over 4) make 4