Um, when we say Dany is going dark by her colors we’re talking about her wearing both the red and black of her house colors. The same house that comes from a culture that enslaves and conquers people. We see that in earlier seasons when Dany is screaming about how “she’ll take what is hers with Fire and Blood” Fire and blood being the slogan of her house and all the terrible things her ancestors had done. She had embraced the darkness long ago. Many seasons past. Her downfall was inevitable.
Stop beating the dead horse.
The Starks house colours are grey and white.
Daenerys' house colours are red and black.
She doesn't wear much black until the later seasons, much like literally every other character who isn't in the night's watch. And Daenerys doesn't “scream” about the fire and blood quote in the books. By the way, your precious Sansa Stark will not live happily ever after because that's not how the world works. She will offend someone somewhere along her reign by not wanting to marry, and that person will rally banners against her and she will most likely die.
Do not ever come seeking me again. I don't give two shits about House Stank or you rabid assholes.