Using Roon, I always see magenta when they are doing the first unfold. Otherwise, blue or green will indicate "studio" or not. Perhaps you had not enabled the MQA core decoder in your Roon device setup, while it is enabled by the iFi Zen.

BTW Has your 218 been updated to v1.1, build 218 using Meridian Device Manager Version v37?

Server: Audiolinux Roon NUC w/HAF room correction and crosstalk cancellation
Theater: 218, Allo Signature, miniDSP, HD621, C61R, DSP5200SEu, 420, 33, NHT subs
EtherREGEN w/Finisar fiber, Shunyata Denali
Living Room: RPi4 Diretta Host & Target, Ghent USB > Singxer SU-6 > AES NA M-Links > DSP9
Shunyata TritonV3, LHY lps, Farad Super3, Stack AUVA feet