Colour calibration is important, particularly for displays. Instruments to do this can be costly, but even a more basic method is a big help.
This explains how OS X renders an image for output, to the display, printer, etc., and what rendering intent is.
Explaining colour management for the non-pro user. Why do you need it?
Should all displays use Apple’s True Tone automatic white balance adjustment?
Although lightness and chroma can usually be approached successfully using methodical approaches, long experience has shown that hue is much more hit or miss. Developing a good ‘eye’ for colours is generally much more important.
What do we actually perceive of colour?
If we are to understand colour in painting, to comprehend how to apply pigment to depict what we see, we first need to understand our perception of colour.