Good job. :thumbup:
You can set that out in the sun if you'd like to darken it some. You can also (lightly) oil it, whip up an easy vinegaroon (steel wool + vinegar, do a search), or I've read that shoe polish will dye leather though I haven't tried it myself. My local cobbler carries a number of Fiebings dyes so that's another possibility too.
I like natural colored veg tanned myself.
What would you have done differently or improved on?
Areas for improvement that I see-
Beveling the edges at the top. A bit of sandpaper will work, easiest to do before stitching.
Maybe not so deep so that the knife is easier to retrieve.
Cleaner forming.
Keeping the leather clean, although that could be done on purpose or could be from the photo editing.
It's all subjective though. I see a lanyard so perhaps you like a deep fit and rustic look?
I'd be proud to carry it.
