So, you have the C2C technique down pat, but what's a corner-to-corner blanket without changing colors?! To make those gorgeous graphgans that you are looking at, you have to be able to change colors. Is it difficult? Of course not! Take a look at this picture tutorial to see just how easy it is!
So, you have your C2C started, but your graph pattern calls for you to change colors! Now what?
Do your first two dc's (double crochet) in the block before the color change is needed. Then do the third dc, but do not finish the stitch!! Once you get to the last step where you have two loops on the hook.
Drape your new color over your hook, leaving approximately 6" of yarn to sew in later (Yes, with color changes you will have ends to sew in. There's no way around it. The more color changes, the more ends).
Finish your dc with the new color as shown below.
Sl st in your next stitch and proceed as you normally would with your new color.
Please let me know if you have questions! Post them as comments on this thread, and I will be glad to help! If you have any suggestions, you can post those as well.
Thanks for coming by! Until next time...xx