I agree, but also, I can't post one picture of my daughter with a binkie that doesn't get similar comments.. She really appears to be too old for it. I've started withholding it from my daughter except for nighttime.. I know you didn't come here for parenting advice, but I'm just being real with you.. I'm fighting the same battle with a 22 month old daughter.
As for the picture, selective coloring either works or it doesn't, and IMHO, it only works with vibrant colors that pop.. The blanket is too soft in this case to really be effective.. You almost have to look at the rest of the picture to verify that the blanket is the only thing in color.. Were it a red or blue blanket with high contrast, etc., perhaps it would be more powerful..
But that's an adorable little girl.
0.02