There are lots of publications and blog posts on the exterior colors of the Apollo Lunar Module (a function of material choices), but I've struggled to find any information on the interior colors and why those colors were chosen.
This is a modern-day photo of the inside of Lunar Module (LM) Serial Number 2. Serial number 1 was used in an unmanned Earth-orbit-only test flight (part of the Apollo 5 mission) and the second one (LM-2) was built for a follow-on test that was deemed unnecessary and never flown.
LM-2 was used for ground testing prior to the first successful Moon-landing mission and later converted for permanent display at the National Air & Space Museum in Washington D.C.
Note the missing Apollo Guidance Computer Display & Keyboard (DSKY) in the lower center console. I wonder what happened to it? Maybe it went to the Computer History Museum?