Go to the very top of the Oracle. The top of page 1,

There you will see the second post is called PLANETARY COLORS AND POWERS.

This is the most important information for knowing candle color correspondences.

There are some variances you will find elsewhere...but this is straight from the Keys of Solomon and you can't go wrong with it.

In Kabbalistic magic your colors for Wednesday and Thursday will be swapped. In Kabbalah Jupiter is blue and Venus is green. Both systems are correct and you can use either/or as you see fit.