Think of this palette as a single red stretched across a long dial. Petal Blush is that red turned almost all the way down — soft, airy, and easy to live with — so it does the heavy lifting on your main walls. Garden Red is the same family with the volume up, and you only need a little of it.
The two warm neutrals keep the whole thing honest. Soft Linen is a creamy off-white that stops the blush from reading sweet, and Warm Clay adds an earthy, slightly contemporary middle tone that links the pale and the bold. It is the color that makes the scheme feel current rather than nursery-soft.
Finish with Deep Plum Brown in small doses — a frame, a handle, a lamp base. It gives your eye somewhere firm to land and makes both the blush and the red look richer by contrast. Lead with the soft tones, season with the red, and let the dark notes anchor it.