Input the Image

The image representing the soldiers in a trench during WW1 is the suitable image. Either use the copy-paste method or save + input the image. This is what the image originally looked like.

Step 1: Step 1: Access the Hue/Saturation Menu

The Hue/Saturation menu is accessible through the Layers menu, located at the tab on the right side of the screen. The Hue/Saturation menu is located at the bottom of the layers menu, with a logo of a black-and-white circle representing it.

Step 2: Step 2: Create a Hue/Saturation Layer

Create a new Hue/Saturation layer and adjust the color to the color you desire. Remember to turn on the ‘colorize’ checkbox. The entire image should be your selected color by then. We shall fix this in the next step.

Step 3: Step 3: Color the Entire Screen Black

In order to properly hide the Hue or Saturation, you need to color the entire image black. You can do this quickly by doing Ctrl + Backspace.

Step 4: Step 4: Color the Portions You Need White

For the next step, you need to paint over the portions of the image that you need that specific color. (Example: Paint the sky white with the Light Blue Hue so that the sky turns out light blue.)

Step 5: Step 5: Create New Hues/Saturation Layers

For new and different colors, you’re going to need multiple Hue/Saturation Layers. Proceed to create multiple layers for your colors.

Step 6: Step 6: Color the Soldiers' Uniforms in a Light Green

YbI colored most of the soldiers’ uniforms and helmets light green. Most of the soldiers, especially the ones exposed to light, were decorated into light green.

The image shown is a preset for the specific color I used.

Step 7: Step 7: Color Other Soldiers' Uniforms Dark Green

For the soldiers who are away from the camera, not exposed to light, or just wearing a dark uniform, you’re going to want to color their uniforms a dark green.

The image shown is a preset for the specific color I used.

Step 8: Step 8: Color Their Bags, Scarfs, and Other Items Tan

This color can be up to your discretion, but I colored many miscellaneous items into a light tan, as that was the most likely color to use as camouflage.

The image shown is a preset for the specific color I used.

Step 9: Step 9: Color Their Guns a Dark Brown

Soldiers’ rifles were most likely a dark brown, because most were made of wood and others were painted brown for camouflage. In the image, you can see plenty of guns being carried by soldiers, so paint them brown.

The image shown is a preset for the specific color I used.

Step 10: Step 10: Color the Rest

I couldn’t color the rest of the image due to time issues, but someone else can. By creating multiple Hue/Saturation layers and coloring the rest of the image, you can fully colorize this picture from WW1.

Step 11: Step 11: Organize Your Hue/Saturation Layers

Label and organize your different layers so that the wrong colors don’t overlap each other. (This prevents incidents such as having the color of the sky covering the soldiers’ helmets.)