I know you are all thinking, How did she figure out how to match the colors for the [Lilo &] Stitch? Since I am all about being helpful and transparent, here is a short tutorial in Matching Color To An Image Lifted From The Internet™.
Step 1: Find your image. Remember: Google is your friend.
Step 2: Search KnitPicks, Webs, and any other online yarn retailer you can think of to find yarn in the exact shades you want.
Step 3: Despair. This is impossible, not to mention extremely expensive.
Step 4: Step back and think. (I know; revolutionary, right?)
Step 5: Make multiple copies of your image. You are going to manipulate them.
Step 6: Crop each one so the selected color is right at the edge of the image.
Step 7: Rejoice in the cleverness of you.
Step 8: Click over to the Color Library | Color Formulas | 500+ Colors section of the Rit Dye website. Gasp at the virtual ocean of color chips.
Step 9: (We are getting to the good part.) Find the page with your color family. Open the cropped image of the color you want. Compare the two, searching for the exact match of your dreams.
Step 10: Despair. The cropped color image is too small! What to do, what to do?
Step 11: Enlarge the cropped image. Duh.
Step 12: Compare. Rinse and repeat as necessary.
Step 13: Ta da!
Steps 14, etc: Repeat for all the colors.
Step 15: Resist the urge to screw with the colors.
Next up (in a few weeks): did this actually work?