Depending on the Color Picker, there will be minor differences (there are already step by step Instructions).
But this is graphical Instructions for the Crochet/Product Color Picker tool
1. Enter RGB Values or Use existing color passed on from the Image Color Picker tool.
2. Click a "Find Closest" button to match colors using that "Find Closest" method.
3. Optionally choose a blend (depending on blend type like for example 50/50 [2 strand] or Third Blend [3 strand])
4. See P-codes (color codes) on the colors matching canvas following the the color ordered number.
5. Look up the color base on P-codes on product image.
6. That's it!