Description of problem: The 4th type of color choosing method is not working properly. Version-Release number of selected component (if applicable): GIMP 2.2.13 Steps to Reproduce: 1. Open GIMP 2. open color choosing window by double click color choosing button 3. click the watercolor (4th) tab (with brush icon) 4. select a color from the square window. Actual results: Clicking the color wouldn't select the color I want. Upon multiple click, the color gradually changes to black. Dragging from one point of the square to other point makes the color blackish. Dragging from one point of the square to right side of the window makes the color brighter. Expected results: Proper color should be selected. Additional info: This is not related to the problem; but I want the color I have be added to the history my mistake to be removed. So, there should be a color history removal tool.
The watercolor picker more or less works as designed. Contrary to real watercolors, you must start with a bright color (adjust the slides to the right or pick a color with another color picker), from then on it will only get darker. Please refer to the GIMP documentation (currently at http://docs.gimp.org/en/gimp-dialogs-content.html#id3525051 ).
(In reply to comment #1) The documentation do not inform what would be the result of dragging. I have noticed that dragging from one point of the square to right side of the window makes the color brighter (reddish as red is on the right side). So, it is not a bug. But the effect of dragging is not documented.