So I use this site use the colors in the pfp I wanna use for my profile, it should help you with figuring out your profile's color palette: https://imagecolorpicker.com/
Also!! You could try using gradients for your buttons, backgrounds, etc... I think you already know how to do that but to remind you, use this instead of just a hex code in your profile customization:
linear-gradient(#hex, #hex)
That's mostly it tbh. You could also use a basic color picker just to help you with the gradients if you need more colors than what your pfp provides you with.
So I use this site use the colors in the pfp I wanna use for my profile, it should help you with figuring out your profile's color palette: https://imagecolorpicker.com/
Also!! You could try using gradients for your buttons, backgrounds, etc... I think you already know how to do that but to remind you, use this instead of just a hex code in your profile customization:
linear-gradient(#hex, #hex)
That's mostly it tbh. You could also use a basic color picker just to help you with the gradients if you need more colors than what your pfp provides you with.