Creating cinematic color effects in Adobe Photoshop CC 2019.
Duplicate the layer just for the Backup
>>Go to Image > Mode > Lab Color
>>Select Don’t Flatten Option
>>Select Channels in the Layer
>>Select “A” and then press Ctrl+A to Select All
after that Copy by pressing Ctrl+C
>>Select “B” and then Paste it by pressing “Ctrl+V” Select Lab
>>Deselect by pressing Ctrl+D
>>Click Layers to get back.