Yes it can be done :)
I just added a darker D to create more depth (shadow) on #89 & #92, and #93 has a much darker outline for you to compare..
If you notice, there are white outlines around the 3 bars on #51 but not on #50. The white outlines around the bars make them stand out more than the D. Just to let you know so we can refine the one you like more.