Step 11 Go to Layer > New Adjustment Layer > Photo Filter. Use an orange for the color with 20% Density.
Step 12 Go to Layer > New Adjustment Layer > Hue and Saturation. Reduce the Saturation to -50. Next, go to Layer > New Adjustment Layer > Gradient Map. Use black and white for the colour and a blending mode of Soft Light.
Step 13 Add a new layer to the top of the layer stack and fill it with blue (#12497c). Change the opacity to 60% and the blend mode to Soft Light. Add another layer and fill it with green (#257940). Change its opacity to 60% and the blending mode to Soft Light.