Already did. One of the reasons I like red heart yarns--no dye lot so it's easy to match. But I feel like it's ridiculous to have to buy almost 400 yards of yarn when you only need about 75 feet.
But, as long as I had to get some yarn, I bought the yarns I need for the project my autistic nephew requested (younger brother of the scarf recipient). I won't be starting that until I finish the hobo gloves my son wants.
I guess old habits die hard: when I was just learning to knit I only had 2 pairs of needles (sizes 6 & 8). I couldn't start a new project until I finished the first.