it's really easy
1. go to image/adjustment/replace color
2. u can see 3 droppers click on the first one in the left
3. click on the pink color on your image , u can see the selected areas in white ( below the droppers)
4. set the fuzziness to max (200)
5. click on the middle dropper to add some darker pink colors
6. now if u can see that all pink areas are selected ( in the little window they should all be white) play with the Hue Saturation and lightness , to get the dark green
for your image Hue (-160) Sat(-35 ) and lightness(-65) can be good
