Hey, here is an idea; I have a layer with a photo and i have a layer with text on top. I lock the textlayer and select the eyedropper tool. I click on the photo and the colour is picked. Just like in illustrator...Wishfull thinking?

Here is another golden idea:
I have a photo of an interior, mostly brown- somewhat green and overal grey, but there is an amazing pop of yellow because there is one small flower on a painting.
I select the Colour Theme Tool, I zoom in on the flower, and click on it.
My brain is conflicted why there is no yellow in the theme... did I miss? No..
So, maybe add another responsive box colour (6 instead of 5) so every time you click on a colour that you pick by hand, it will come up in the theme.