Here’s a tutorial for changing the colour of one object in an image – it only takes a few quick steps
The Quick Selection tool is ideal for one-click selections over small objects such as these berries. Make sure it’s set to Auto-Enhance so that it detects the edges more accurately. Click over the object to select it.
Set the Brush tool to Hue in the Options bar and lower its Opacity to 10%. Set its Size so that it’s just larger than the object. Choose a Foreground colour of your choice for the colour change.
At this stage it’s worth dragging the Background onto the Create a new layer button to duplicate it. Click multiple times over the object to change its colour. Because the tool’s Opacity is at 10%, colour can be built up gradually. Also, Hue mode means that the lighting of the object is kept.