Many modern witches are leashed to the ideas that correspondences will strengthen magic. This isn't neither wrong nor right and I don't want to debate its validity here. Instead I want to illustrate an alternative and back it with facts.
1)Magic is generally described as being reliant on belief that what you do will influence the world or All
2)Almost every tradition draws on the past traditions of magic
I'm going generalize and assume that most people who read this agree with those two points.
Now lets look back in history. Way back to the old witch in a hut on the boundary of her village. Lets look at the average citizen in ancient civilizations like Rome Mesopotamia and Egypt. Neither one of these people would have access to specifically colored candles or
astronomical knowledge either due to poverty or lack of education. So was their magic less? Did their ability to harness the natural flow of energy around them suffer along with their purses?
The specific color correspondences planets and
numbers that many witches today use first started to really impact occult thinking during the Renaissance with the creation of Hermetic orders like the Golden Dawn. If we look at history we can see that only the wealthy belonged to these orders and had access to the materials they believed necessary for successful casting. To the common witch these things were still irrelevant.
The vast majority of witches did not have access to specific colors or ingredients or knowledge until very recently.
My point in all of this is that the color or a candle or the hour of the day don't matter unless you chain yourself to that belief.
I quite frankly don't want to have such restrictions on my magic. I practice like the witches of old with wit and what's laying around the house.
Thank you and Gods bless