Adjust the sky’s temperature (typically cooling it down) in ACR to match the bluer tones often found in blue hour foregrounds.
: Open your foreground and sky images as layers in a single Photoshop document. Convert these layers into Smart Objects so you can apply non-destructive edits via Adobe Camera Raw (ACR). Download File Milky-way-composite-ps-tutorial-m...
: Use a 50% Gray layer set to "Luminosity" blending mode to isolate and compare color information between the two shots. Adjust the sky’s temperature (typically cooling it down)