Red: the strongest chroma, in the middle values
Red reaches the strongest chroma of any family, and it reaches it low. A 5R at value 4 runs all the way out to chroma 14, further from gray than any yellow, green, or blue can travel. Take that same red lighter and it turns pink and gives up its strength. Take it darker and it closes toward brown. So the vivid reds live in the mid to low values, and that is where a painter spends them.
The 5R page below shows it. The right edge bulges at value 4, the fullest row on the page, and pulls in above and below. A red can be intense at a middle value and simply cannot be at a very light or a very dark one.
The 5R page, red value by value and chroma by chroma. It also sits beside the other families on the color charts.
How the painters spend it
Every use below is drawn from a methods.art record, not invented for the page.
Vermilion was the only saturated color on his four tube palette, so Zorn spent it deliberately: a small note of pure red at a focal point, a lip, a cheek, a ribbon, a pin, in an otherwise muted field of ochre and gray. See the whole discipline on the Anders Zorn page.
Daniel Bilmes takes burnt sienna as his red primary, one of three muted primaries he balances with ultramarine and yellow ochre. A quiet earth red, not a bright one, because the honest work he wants is muted rather than garish. See it charted on the Bilmes palette.
Frank Reilly premixed a red string, starting from Cadmium Red Light and stepped down the nine value scale, so the value of a flesh tone was settled before the brush moved. See the organised palette on the Frank Reilly page.
