In this effect, photos with cool colors (eg. blue, green) will become darker and warm colors (eg. red, orange) warmer. The results are dark grass and trees, vivid colors and glowing tones.
Step 1: Open a photo, you want to work on.
Step 2: Change the color mode to Lab color (Image > Mode > Lab Color).
Lab color mode contains a chroma. This channel identifies the cool and warm colors.
Step 3: Create a new Layer (Layer > New > Layer or Shift+Ctrl+N)
Step 4: With the new layer selected, use the Apply Image tool (Image > Apply Image) and set the following properties
Layers – Merged
Channel – a
Invert – Unchecked
Blending – Normal
Opacity – 100%
Now that we have defined our layer with the cool and dark colors, we can blend the layer into the image and adjust the result accordingly.
Step 5: Change the blending mode of the top layer to Soft Light
Step 6: Open the Levels tool (Image > Adjustments > Levels or Ctrl + L) to adjust the effect. To increase the effect, move the black and white input sliders towards the center.
Step 7: Editing part complete, so let’s change the image mode back to RGB color (Image > Mode > RGB color)
Step 8: This effect may cause some parts to be over saturated. To fix that, simply use the Hue / Saturation tool (Image > Adjustmens > Hue / Saturation or Ctrl + U) and lower the saturation.