@nycki People like using color palettes (a set of ~4-6 colors that go well together) for creating art. So when you recommend someone that they try "yellow green" and "magenta" together, it's important to have mutual understanding which source to use to match the color name to the exact color code and that source only has 1 color code for each name.
Corresponding part in the video is about 2 minutes long from the timestamp: https://www.youtube.com/watch?v=U2-SDT0m4Dw&t=407
@Cyberbeni btw how do you solve it other than not telling them try magenta or fuchsia but rather try #ff2231 (random example) because I can't figure a more accurate (and quick) representation of matching a colour than using the full RGB?