All the colours in the Rainbow and all the tastes in the world.
The colour of pain cannot be described with the few colours that we can see. Pain is multifaceted. It is black as night. Green as envy. Yellow as the sun. Blue as the sky. Red as fire. It is the grey of an overcast day; the white of the walls in your room; the blue of their eyes. It is the pink of a flower; the green of grass; the orange of a sunset. It is the red of blood; the silver a knife; the peach of skin. It is the black of that signature; the brown of the table; the gold of your ring. It is the blonde in her hair; the pink of her cheeks; the brown of her freckles. Pain is no single colour but all of the colours.
The taste of happiness cannot be described by our simple palate. Happiness is complex. It is sweet as a sticky bun. It is decadent as a silk pie. It is bitter as vinegar. It is sour as a lemon. It is savory as a roast chicken. It is the meal of a first date. It is the salt of their skin. It is the first sip of coffee in the morning. It is the cheap beer at a music festival. It is the dirt on your lips after winning the game. Happiness is no single taste but all of the tastes.