system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are the colors arranged in the 000000-FFFFFF spectrum?
gpt
The first 2 digits are the amount of red, on a scale of 00 to FF (or, 0 to 255 written in base 16.)

The next 2 digits are the amount of green.

The next 2 digits are the amount of blue.

This isn't every color possible, but it's a wide enough color space that we don't usually notice that we're missing out on anything.