New pride flag divides Philadelphia's gay community.
More colors on the rainbow flag? I'm pretty "live and let live." Whatever. As long as people aren't fighting about it, but too bad, there does tend to be friction. The phrase, "we've met the enemy and he is us" comes to mind. It's really up to us to have diverging perspectives without being disagreeable.
According to WIKI, the original gay pride flag had more colors anyway. It had hot pink and more than one shade of blue. The flag was streamlined with those colors dropped, in part, because lack of availability in pink cloth, back in the late 1970s, I guess.
The flag is like the acronym. Gay is pretty limited so it becomes gay, lesbian, bisexual and transgender; GLBT. Then there's more. Allies, questioning, gender fluid and so forth. GLBTQA...? The acronym can get cumbersome so it can be replaced with the word "Queer." An umbrella term? The "big tent?" That doesn't please everyone either.
Some folks might argue that the laws of physics, related to light refraction, doesn't allow brown or black to show up in real rainbows. Brown isn't part of that spectrum, but what is color anyway? Color is an artifact of our perceptions. The true refraction of light is just a gradation of frequencies on the electromagnetic spectrum. Brown and white are various mixtures of light frequencies. Black is absence of light.
I don't think the flag is necessarily cast in concrete. There can be many versions of it.