Eye drop colour picker option when in 'create new theme colours' dialogue box.
When you are in the main colour theme dialogue, unlike when formatting colours on slides, there is no eye-drop function. This means having to note down RGB numbers (or use a third party software) to then type in... laborious... tedious... and the function exists elsewhere in PowerPoint... but not in this one dialogue area... =(
Charles T. Cranford commented
Please - some of us need to save time and get things cranked-out. You already have color-picker, just share it with "Create New Theme Colors"...(Sharing is Caring...right???)