ok since people are getting confused and just saying "4chan stuff" I'll actually explain the meaning because I think it's a pretty good message.

I'll explain using a transfem experience since that's what I'm knowledge on, but the post could be referring to transmasc or something else.

background: Orange is a trans woman. She was assigned male (another color) at birth and has transitioned to orange.

explanation:

orange has been on "color gel"[1] for 3 years, but "grayscale-mode"[2] in public.

1.The color gel is a show in for estrogen/testosterone gel which is a hormone that makes you appear more feminine/masculine.
2.Trans women, particularly those who are early on in transition, will sometimes "boymode" in public if they don't feel safe enough to be themselves. This is saying orange will pretend to be grey to not out themselves.

green is confused as they see orange as nothing other than orange.

orange feels that her color is too close to whatever she was before and says some 4chan type jargon

in trans women there are a lot of negative genetic elements that will make it harder to pass which you can't really change. Wide shoulders, being tall, deep voice, etc. Orange is dumping her trauma about this, saying everyone can tell and has accepted her fate as not passing.

Green says that they think whatever site orange is on is bad for orange.

this is because on 4chan or some other negative sites like some reddit subs people are BRUTALLY honest which can be a good thing but can also be horrible for self esteem. Another point is that people who are trans themselves notice the signs that someone is trans and can clock them easier than an average person. This brutal honestly made orange feel like she doesn't pass, but that's just because the people on the website have WAY more knowledge than average people, like green.
Average people see trans women as just normal women with perhaps a deep voice.

TLDR:
orange was assigned another color at birth and feels like other people think they're that color after exploring websites. Green is saying orange looks like orange and that the websites are unhealthy.

edit: also it's 4am and I just had a panic attack. I cannot think through words well rn, sorry if this is confusing. please don't be mean to me

I can answer questions if needed once I can think better