Here's an easy tutorial for adding color to gum paste rose leaves (or any other type of leaf)!
1. To make your color more muted (not as strong), you can mix it with cornstarch to apply the color in a less prominent/softer way. This is a great way to achieve a lighter color.
2. Use the petal dust that falls onto the plate from both colours to blend the two colours together and fill in any gaps.
3. Clean your work surface with a damp paper towel before using a kitchen rag. This will pick up most of the dust that might have gotten onto the table, and protect your kitchen cloths from color stains.