Don't change that channel ...on second thought, go ahead and change it.
Adobe Photoshop 1.0 was introduced to the world in 1990. At first blush, I was fascinated with it, then quickly became addicted to it. I was still airbrushing by hand, but I knew this quirky new software was going to be a game-changer. I practiced and practiced, kept up with the updates – and finally, FINALLY, got the hang of working with alpha channels. Then, in 1994, along comes Photoshop 3 with it's biggest game-changer: layers. It seemed everybody was working with layers and tossing alpha channels aside. To this day, with all the updates and additions, alpha channels are still the most powerful tool in Photoshop, and in my opinion, a retoucher's best friend. Where else can you target a luma zone and adjust the color, contrast, hue, sat/desat, brightness, levels, etc. (the list goes on)? Layers are great, but alpha channels reign supreme.
Do not dismiss the POWER of PRAYER
In these days of Covid-19, I find myself looking back to 2009 and remembering a horrible time in my life – my wife on life-support with zero chance of survival. Diagnosed with bacterial meningitis and a 12% chance of living, her symptoms only worsened each day. With the onset of sepsis, followed by eight organ failures, her mortality rate was 118%. She was as good as dead. Then, with the power of prayer, and prayer chains circumferencing the world, God stepped in and showed that He was in control, that He was the Almighty One, not an earth-bound disease.
Prayer works! Try it once or twice and see what happens. All God wants is for you to love Him. Think of it this way: He sent His only born son to die for the sin of the entire world –– BUT–– if need be, Jesus would be crucified again for you....and only you.
Below is an example of finishing. Dark blues and light cyans were added to shadows and mid-tones; yellow and light blue to highlights; and a color harmony applied (note the bluish green leaves).
Color harmony in finishing
Your client sends you an image they love and want to use in their current campaign. The only issue is that it isn't consistent with the other images in use, or worse yet, it clashes with their logo colors. The answer is simple, adjust the color harmony. The client gets the image he loves with brand continuity.