Check your Service Parts Identification tag in your glovebox (embedded below). My paint code is 50U and you can see where it's located. Look for the code in the same spot on yours. Did a little searching online and found that a paint shop can mix if they have the total code (in my case it would 50U-U8624, yours would be whatever letter/combination that's next to the BC/CC on the bottom left). Someone posted a link to S-10 forum's RPO list but I can never find it when I need it.
EDIT: The paint code will have a number then a U next to it. When you find that just google it and it should tell you the color name, too. I'm gonna guess yours is either Space Blue Metallic (23U) or Indigo Blue Metallic (39U) as researched here
for your model year.