Chanel.com lists the shade as 15 and says the following:
The luminous hues of sunset are now captured in one elegant highlighting face powder. Subtle gradations of rose, coral and peach can be applied on their own or blended together, to highlight and sculpt the face or achieve an overall warmth and radiance.
(Shades are swatched separately and then blended together on the far right)
Glowing Blush Harmony Soft Glow Blush is a lovely and luminous melange of plums, peaches and pinks. The pigment is nice and soft and easy to apply and blend. The slight shimmer is not overpowering, and will look amazing in the spring sun. (It's not as frosty on the face as it looks on the arm swatch).
The packaging is your standard black Chanel plastic casing with mirror and a brush. The brush is the perfect size and shape to blend the colors together and pop on your cheeks. It's also small enough to only use the top shades for a punch of pink, or just the bottom for a soft peach glow.
(Left - just the pinks, Right - peaches)
Chanel Blush Horizon de Chanel/Glowing Blush Harmony Soft Glow Blush retails for $58.00 and is new for Spring 2012.