First, it's unclear to me what you consider to be "good colors". The quality of color reproduction is a complex chain of dependencies, such as white balance, filters, iso value (color noise), lens, color space, image format, monitor and printer quality, etc.
Second, most photography review sites (of which dpreview is my personal first choice) have a paragraph or two in their reviews about image quality. For example here is a link to such a page for my latest buy, a Panasonic Lumix LX100.
In the glossary of DPreview there is an interesting statement about color accuracy:
Conventional sensors using a color filter array have only one
photodiode per pixel location and will display some color inaccuracies
around the edges because the missing pixels in each color channel are
estimated based on demosaicing algorithms. Increasing the number of
pixel locations on the sensor will reduce the visibility of these
artifacts. Foveon sensors have three photodetectors per pixel location
and create therefore a higher color accuracy by eliminating the
demosaicing artifacts. Unfortunately their sensitivities are currently
lower than conventional sensors and the technology is only available
in a few cameras.