Peter van den Hamer article "DxOMark Sensor for Benchmarking Cameras" shows in figure 7 that larger sensors have better color depth at low-iso meaning the ability to distinguish more colors. Is this what the OP meant by "better colors"?
For me better color would be the said property above, plus color accuracy from subtle to saturated shades.
Eduardo
The following is a quote from the article:
"Here is DxOMark's definition for their Color Depth score:
Color Depth is the maximum achievable color sensitivity, expressed in bits. It indicates the number of different colors that the sensor is able to distinguish given its noise.
The metric thus looks at local color variations caused by noise. It does not cover color accuracy – presumably because that can be corrected in post processing and maybe because it opens an eXtra Large can of worms."So the larger sensor can differentiate more colors up to noise, but an essential question is how many colors can the human visual system perceive simultaneously?
One answer is given in the
RIT Color FAQ. The answer is millions and millions, but is well short of 24 bits (16,777,216).
Color accuracy may be more important, and as anyone who has tried to profile a digital camera knows, accuracy is not that easy to obtain and is in fact impossible with current technology. DXO does mention a
Sensitivity Metamerism Index as a measure of color accuracy but does not integrate it in DxO Mark.
Regards,
Bill