jogless joins via spiraling, rather than fixing up color changes, and I also wanted to make a quick baby hat for my baby to wear when he is born. Finally, I did it.
I got 2 balls of Debbie Bliss Baby Cashmerino (I know I can machine wash and dry it) and started. It wasn't hard to start and the only thing I had to be careful of was whenever I changed color, I was careful about the tension - if I tugged on the yarn (like I usually do to avoid laddering), then it created a column of stiff fabric. Too loose, and it laddered (a little). But here it is, and I love it! This is a really easy hat over 56 stitches on size 5 needles.
Here is a close-up of the side where I changed yarns: no jogs! (Color here is more accurate than above, too.)