Colour can be used to help with psychic and mediumistic readings as well as for healing. All the colours of the rainbow can be used. And, all the different shades of each colour.
A medium will often see colours and whatever colour a spirit shows to a medium means something. It is though, a personal choice for the meanings of each colour, and it becomes a partnership between the medium and the spirit guide.
If a spirit contact wants to send healing to someone in a message, the guide will give me blue. It will be in a form related to the message and communication taking place. For instance, if the spirit is bringing a rose, the rose will be a memory, but the colour matters, and so in this case they would show me a blue rose. One for the memory and one for the healing.
This is a simple example and if the medium wants this to work they have to become a dedicated developer of their mediumship and work with their guides through meditation. It is all worthwhile and makes mediumship so much more involved.
There will be more on this subject tomorrow!