Take some of the wood dust and wet it with water. That will be the approximate color when it is wetted with epoxy. You can get different shades by making wood dust from a variety of wood. Except for some very white woods most get considerably darker when wetted. I tinted some epoxy to repair a rosewood plane handle. The wood used was a rather light shade of redwood. The repair was almost invisible.

: I am building a expedition single,strip with red cedar.It is all striped and
: sanded. I am ready to do a fill coat with epoxy to fill holes and small
: gaps.I don't have much saw dust but my brother in-law has built several
: boats and gave me some powder that he says is used to mix with epoxy to
: fill with.But it is the color of pine and I am using red cedar. Can I use
: somthing to color the filler powder?