I keep K&G epoxy colors in black,white, tan,and red. With those I can blend a match for almost any wood I use.One jar of each will last for years.The only one I have ever replaced was the black. And I use a lot of it.You only need a small pinch to make a big puddle of epoxy ebony black.
While I'm on the subject, I use only K&G 24 hour epoxy. It comes as a thick (very) liquid in two jars. Mix it on a small kitchen scale (I put a 5X7" card down as a pallet), weighing exact even amounts. You have a couple of hours to work with, four to a firm set. Overnight to full set. Let it cure for a day or two and grind away. Never had it let go yet.BTW, don't clamp too tight or you will squeeze out all the epoxy and the joint will fail due to no glue! Just clamp with gentle pressure to hold the scales in place while the epoxy sets up. With the slow set, the plus is being able to make adjustments and do cleanup without rushing.
If you want the handle to last a lifetime- taking a day to glue it up doesn't seem too much to ask.
Stacy