...
Note #1: if you select “Collapsible” it will auto-select both “ScrollableTitle” and “TitleScrollable”.
You will need to first remove “Collapsible” in order to remove “ScrollableTitle” or “TitleScrollable”.
Note #2: if you select “Icon” “Icon” or “Lozenge” it will auto-select “Title”
...
Click on one of the colored boxes to open the color picker.
Click on one of the 15 preset Atlassian-standard colors.
Or drag the two circles around until you land on the perfect color.
Note: you can also paste in a HEX color code.
...