Sabrina , Blue is supposed to be a healing colour .
I my self performed three healing rituals for a young boy who had Luekemia and I can say that on all 3 occasions his white cell count lowered . This of course can be put down to coincedence.
However with Magik there are a couple of things to concider , a healing spell can be viewed as black magik if it is done with out the permission of the person involved . The other thing to concider is that sometimes people are supposed to get sick . In the greater scheme of things there are reasons for it . I know it sounds like utter twadlle but I believe the ritualls are worth investing time in .
P.S. If you are interested in the colours of candles and there specific meanings I'll be glad to post some for you