Yes the color slider is verry weirdi ndeed ;
I always found the covolver soundig different to toher i.R. reverbs ., sometimes the diference is really big ,
So I did some tests over the past years n and when the impulse sample of the convolver .
This is not the case with convolver , it applies a highpass filter to the input signal , for eliminating dc …proof is in topic below
Here you can read all about it ,
https://forum.renoise.com/t/convolver-applies-dc-offset-filtering-to-impulse/44886
Ofcourse not a single reply from the developers