Mark it Up by Clever Monkey Graphics includes 45 assorted scribbles created with an assortment of drawing tools including pencils, markers, & crayons. While these are shown to you in colors on the preview, they are in fact black.

Scribbles like these work as wonderful space fillers in layouts adding fun, texture, and organic interest to your layouts. The smaller arrows, happy faces, etc., are great for adding fun little touches to your layouts. I can see these working wonderfully in all sorts of layouts from the clean graphic styles where you want to add just that perfect touch of fun to crazy wild art journal style layouts where they become part of the mesh of layers of paints, etc., on your page.

All scribbles are shown at actual size relative to a 12x12 inch paper. This product was previously available elsewhere so please check your stash.

How to recolor flat black elements. In Photoshop, the most effective method is to check the hide the transparent pixels button and then fill with the color you want. For my Photoshop, that button is at the top of my layers pallet. Using this method assures that every last speck of your scribble will be filled with your new color choice. Explore your graphic product and see if you have a way to lock YOUR transparent pixels. Since graphic products are build with redundant ways of doing the same thing, this is only one method of recoloring a flat black element.