[Wien] The meaning of colour in band structure plot

Dear Wien2k users, dear Prof. Blaha, Could you explain the meaning of colours in band structure plot produced by w2web? What bands with the same colour have in common? I've examined w2web code and the manual, and it seems that colours are just to make a plot more beautiful, and have no physical

[Wien] The meaning of colour in band structure plot

As far as I understood, if you do not run x irrep, then the colors as you mentioned are just for better recognising bands and having more beautiful plot. In this case each band has one color and band indexing is done by simple counting of eigenvalues from the lowest one toward higher energies (at