These concerns kept me from buying this display case, too! Even if these LEDs aren't blue, but just cold white, they would look really terrible in my collection, because I light up all of my collectibles using warm white LEDs (2700 K). I bought it a few days ago anyway - and just in case somebody was still wondering: Yep, it looks awful in combination:
View attachment 98783
But I was able to modify the light up function using LEE-Filters - you will lose some overall amount of light, but get a more suitable color temperature:
View attachment 98786
Just in case, somebody has the same issue: I used a sheet of
"628 Three Quarter Digital LED C.T.O. Filter" - had also tested a sheet of 624 Full Digital LED C.T.O., but that one lowered the color temperature too much.