system
Given the following post, respond as if you're commenting on Reddit:
human
[Doctor Who] Peter Capaldi’s Twelfth Doctor says that purple is “the colour of death” and gold as “the light of immortality.”

What does this even mean?

How is color a fundamental part of reality if it’s just changing wavelength in light?

Why does it matter?

What are some of the other “fundamental colors of the universe”?
gpt
He's just being poetic. Remember, regeneration energy is gold.

For some people, purple would be the color of royalty. For some cultures in Asia, white is the color of death, while in other, European cultures, it's the color of purity and light. In some cultures, yellow stands for cowardice. In some cultures, green is for life and nature. For Japan, purple is shorthand for darkness or evil.

He's not being *literal*, he's just, y'know. Being poetic.