A/C Fiberglass

[Orange Crate]

I'm checking to see if anyone has run across this before and what did you do. I am rebuilding my stock A/C and when I scrubbed the dirt off my original fiberglass evap housing the two halves were different colors (they looked just fine with all the road grime on!) See first pic. I had purchased another evap housing because I knew I would have to replace the tin plate on mine from rust, so I dug that unit out and it also has two different color halves (second pic). I may just assemble it that way since that is how it came from the factory but I thought I'd check in here to see what others may have run across. Thanks in advance.