You might want to play around with: saturate(). I achieved the following result by supplementing the css style in your example with:
* {
filter: saturate(112.5%);
}
I don’t know if you can individually target the wall, frame and the such, but if you can you would surely achieve a more balanced / mixed result.
I know it’s not a “pretty” solution, but it might suffice as a quick fix, for the moment.
Got the idea from @Lawrence3DPK’s answer in this discussion.