Just go to User Interface Preferences and check "Auto-Collapse Iconic Panels". By doing so, whenever any panel shows up (in this case the Color panel), it will automatically collapse after you click somewhere else on your screen or select another tool.
Just go to User Interface Preferences and check "Auto-Collapse Iconic Panels". By doing so, whenever any panel shows up (in this case the Color panel), it will automatically collapse after you click somewhere else on your screen or select another tool.