[Qiviut]

"Temperature" blankets are popular - AllFreeCrochet has some charts that can be downloaded:

3 Crochet Temperature Blanket Charts - Free Downloads

Other info at the link:
How Many Colors Should My Temperature Blanket Have?
Keeping Track of Your Colors
Yarn Suggestions for Your Temperature Blanket

[Diana in Wisconsin]

I love the Temperature Blanket idea! I have made three of the 'Spectrum' pattern so far - one for us, one for my sister and one that's going to be entered into the County Fair. :) My Sister wanted these colors. I found them obnoxious, but it actually looks great on her grey sofa. I prefer natural colors and she likes BRIGHT! Caron 'Simply Soft' is the yarn used. The pattern was on the yarn label, but I'm sure it's on line, too.