We could define a colour as "heavy" when its shade is too dark or it does not invite to an optimistic and cheerful pyschological profile. Grey shades, that we commented before, are not advisable for a family's home, they create a space that is rigid, sad, and lacks in luminosity, but for a certain business this could be valid. Colours like military green are associated to disease and indelicate emotions, it is the colour used in lots of military uniforms. Colours like the dark brown speak of stagnation and lack of dynamism. In general dirty shades of the basic colours represent complex or difficult aspects of Qi.
It is not too much to point out, that a colour by itself is not enough to make an absolute opinion, we can find a military or a security agent dressing in dark green and being an example of humanity and service to others, and in the same way you could find a person dressed in white that really is someone little reliable. Nonetheless colour in physical spaces gets analyzed in a different manner, they are shades that that remain static a long time and its connotation is more noticeable. We always have to be cautious with the observations and associated mental jusdgements, we could get a big surprise.