Photoshop pencil tool

When creating a material for unity I normally use photoshop. I’ve been having problems with my pencil tool recently. Each stroke I that overlaps with the pencil it turns a shade darker just like the brush tool. Is there a way to stop this? I want it to only pain in the shade I want it to, overlapping or not. Thanks!

You probably have an opacity setting less than 100%.

Set opacity to 100%.

If you are using a graphics tablet turn off pressure sensitivity for opacity (if its on).

Also when making transparent backgrounds make sure opacity is at 100% when using an eraser tool.