Colour Delivery in SCT's vs Newts etc.

Why, would a 16" lx200 be stingy in its color delivery vs. a 17" f/4.5
Coulter (which is great) ? Is there something about the sct design
which
inherently retracts colour delivery vs say larger refractors, newts, and

maksutovs.

Several have suggested its the size of the sct at question, ie. too much
light
overpowering/fading colour. However an even larger 17.5 Coulter newt
and two larger dob newts to 24" all deliver fabulous colour rendition in
fact
these larger newts are the prefered colour delivery scopes we have, vs
the
16" lx200, an old C16, and even the 12-10" scts we use reguarly.

Nobody disputes refractors being superior colour delivery systems.

I have a feeling this involves contrast in optical systems?

Any comments would be welcome.

Jerry