heykody t1_iuctzj0 wrote on October 30, 2022 at 10:50 AM

Reply to comment by blow_up_the_outside in ELI5: Why are the colours in rainbows in separate lines? by Oheligud

and the impact of language is shown by the notion that there are 7 colours in the rainbow. Whilst a rainbow is actually a spread across colour, if you were to divide it, it would better fit into ROYGBV and skip indigo.

[deleted] t1_iucudqw wrote on October 30, 2022 at 10:55 AM

[deleted]

heykody t1_iud01i7 wrote on October 30, 2022 at 12:04 PM

yeh, and 7 was a sacred number

IndigoFenix t1_iue0gns wrote on October 30, 2022 at 4:50 PM

One possibility is that Newton's "indigo" was what we call blue, and his "blue" was what we call cyan.