The original Pride flag was designed with eight colours, but quickly moved to six and seven stripes because of issues with sourcing dyes and mass production. As others have said, each colour did have a specific meaning like Sex, Life, Harmony, Art, Sunlight. These were aspects of the queer community, but they did not mean specific or narrow identities, and did not only describe ‘gay’ or ‘lesbian’ people.

In the words of Gilbert Baker (who designed the initial flag) “We needed something beautiful – something from us, and the rainbow is so perfect because it really fits our diversity in the sense of our race, our gender, all of those things.” Since then people have added specific colours and extra features to draw attention to identities that they felt were undervalued or overlooked, which is laudable goal, but not because the original did not include everyone.

You’re throwing around a lot of strong negative claims about the discussion here, if you really want to make a case that the meaning of original flag did not include queer people who were black or whatever, please bring some sources. And just to note, personally I actually like the chevrons of the Progress flag, but that doesn’t invalidate people claiming that the original flag included everyone.