Well actualy *insert nerd emoji here* You're is short for you are, Your is in the possessive form, like "thats your bike." and You're is used in "hey you're that guy, right?"
I get colour palletes by asking GPT, I Genuinely suck at making choices, so I use GPT to get like 3-7 (Hah, Kento Nanami refference) Colour palletes, which I choose from, its like using it Like Narrowing down the endless options