Red isn’t just a color; it’s a part of Seth-Typhon Himself. Or to put it another way, the Red Lord doesn’t just like the color red; He’s the very essence of redness.
Within the spectrum of visible light, red exists between orange (where red meets yellow) and violet (where red meets blue). Technically, its wavelength is approximately 620–740 nanometers on the electromagnetic spectrum. Historically, it’s been associated with aggression, blood, heat, lust, and passion. It’s also linked to the planet Mars and the sphere of Geburah on the Qabalic Tree of Life. Mars, of course, is named after the Roman God of war, who’s often conflated with the Greek God Ares. (Hence why Mars is so often associated with hostile alien space invaders, as in H. G. Wells’ The War of the Worlds.) Geburah is the part of the Tree of Life where the Gods pass judgment and destroy things, causing them to be transformed (whether they want to be or not). It’s also the sphere where the Gods take whatever steps They need to beat the crap out of evil.
Red is further linked to iron. This is probably because (1) there’s iron in our blood and (2) Late Stone Age people often used ochre, a clay that’s given a reddish tint by iron oxide. Furthermore, red is the preferred color used for warnings and danger signs, with the highest threat levels being “red alerts.”
The Egyptians associated Seth with red because He’s a storm Deity. While most Thunder Gods are linked with fertility and kingship due to the part storms usually play in fertilizing crops, storms almost never occur in the Nile Valley. The crops there are sufficiently irrigated by the Nile itself when it floods each year, so even when storms do happen there, they tend to have disastrous consequences. They more often occur in the deserts on either side of the Nile Valley, the sands of which are colored red (making Seth-Typhon “the Lord of the Red Lands”). Red-haired animals and people were likewise linked with Seth as well, and by the time He was completely demonized during the Late Period, it wasn’t uncommon for such animals and people to be killed as a way of execrating Him. Redheads continued to be demonized by European Christians, who thought that redheads were especially prone to worshiping the devil and becoming witches. This pejorative construct came directly from the ancient Egyptians, and it can also be argued that in Egyptian mythology, Typhon Himself was the original “red-headed stepchild.”
In many Typhonian spells from the Greco-Roman magical papyri, the directions call for magic words to be written in donkey’s blood (which is often described as “Typhon’s blood”). Here in the LV-426 Tradition, we think that harming one of Seth’s sacred animals will definitely draw His attention to you, but not in a way that any sane or rational person would want. However, I do find that it’s good to use red ink in one’s spells. The more red things you can include in your rituals, the better. My coven mates and I make a point to always light red candles for the Big Guy whenever we meet for Sabbath.