What he's saying is that the default energy colour of radiation on melee weapons is pink. He thinks it's inconsistent with other sources of radiation in the game, and wants it to change. Also he can't handle the colour pink existing and thinks it's too "girly".
What he's failed to say satisfactorily is WHY it should change. He said that:
Being common isn't an argument FOR something. We have eyes and can see in its stats that a weapon deals radiation damage. We don't need to see that it's glowing green to understand that. He also hasn't stated why he doesn't simply change the energy colour of the weapon to make it look like the colour that he wants - I mean it's not like there are hundreds or even thousands of individual shades for him to pick which aren't the harbinger of death, PINK. It's not like it's even a pale pink you'd see on a Barbie doll or something. It's a violent-ass pink with a really sick navy blue trail. But clearly the act of cleaving a space zombie in two just doesn't feel the same if there's even an implication of femininity involved.
Fun fact, the Nazis were the ones who ascribed blue to boys and pink to girls! Before that, it was the other way around. It's almost as if a colour has no inherent implication of gender or any other kind of human trait, and it's down to some weird human interpretation that there has to be some kind of meaning behind dope ass colours.