Video: 3 Ways to create a one color image in Photoshop
This video shows three techniques to easily colorize an image in Adobe Photoshop: 1) Turn your image into a Black and White image and use Tint 2) Grayscale your image and use Monotone or Duotone 3) Create a solid color layer and place the image above it; adjust with luminosity layer blending and opacity/brightness/contrast.
Option 1
If necessary, unlock your image. Then go to Image > Adjustments > Black and White. Check the box for Tint. Click the Swatch square to the right of the checkbox and select your color. In this same module, you can adjust your saturation, too. Click “Okay” to finish.
Option 2
Image > Adjustments > Desaturate. Then change the color mode to grayscale. Now can you choose Duotone, so go back to Image > Color Mode and select Duotone. In the Duotone modal box, you can change your color selections and make your image a single color (monotone). You can change the lightness by adjusting Levels or other settings.
Option 3
In this technique, you will make a solid fill color layer. You will place your image, desaturated, above the fill color in your layers. Change the blend mode of your image to “Luminosity” and then adjust the opacity of the layer. You can also adjust your Brightness and Contrast of the image layer.