To measure Ugly Duckling hair color, use kitchen scales or a measuring bowl with markers. For most Ugly Duckling hair color, the correct mix is 1 part hair dye to 1 part developer. For high lift cUgly Duckling colors, the correct mix is 1 part hair dye to 2 parts developer. For Ugly Duckling cream-based toners, the correct mix is also 1 part toner to 2 parts developer.