Photoshop? That's a bit overkill for spritework - you'll find that most of use some free program that offers easier tools for working within the X-Com palette. Personally I use GIMP because I'm familiar with it, and again, it's free.
It's okay, ohartenstein23. It was on the good list of the "image editors / graphics programs" thread. I'm not very good at Photoshop editing or making sprites (Well the brush for it seems so nuts to use, it might draw a 2 rectangle square pixel draw on top, bottom or side).
I never tried some art programs for making XCOM sprites and collecting XCOM sprite palettes like GIMP, Aseprite (It might require money), IcoFX (30 day trial and 29$ dollar single license), mtPaint and others that people use.
I try and use paint.net's color picker tool for finding pixel colors, it was pretty fun for me to find what pixels and its colors i can find on there. ^^
I better start reading threads and posts on HIVE and OpenXCOM forums every day and every year.