Every pin the same muted sage and cream, every headline the same medium weight serif. Beautiful board, invisible feed.
What fixed it for me: keep the type consistent and let the colour move. Type is what people recognise anyway - the shapes, the layout, the crop. Colour is what has to fight whatever is sitting next to you in the grid, and whatever is sitting next to you is usually louder than sage.
Not saying go neon. Saying your palette needs at least one high contrast member and you should actually use it.