Yuyo is a bit quirky and I came across Yosembiance, which is a “flattening” of the stock Ambiance/Radiance.
The author has done a great job - I have come across no visual artefacts in anything, which is very rare.
It seems to me that someone with a bit of GIMP ability could switch it to the Ubuntu MATE colour scheme; the author has already added a blue variant to the standard orange. (I tried but evidently don’t have any GIMP ability - there are clearly subtleties in doing what looks like a simple change, given the bad results I came up with …).