Replace red with black using Photoshop


How can I replace all red with black on the image below, using Photoshop, without damaging the image?


enter image description here

1/20/2016 4:46:00 PM

Accepted Answer

If you have the choice and can avoid using the magic wand tool, don't use it. It can work well on big images but not so much on smaller ones.

Since you simply want to change the image from red to black, you could simply:

  1. Put that image in GRAYSCALE COLOR MODE

  2. Then use the LEVELS (menu Image > Adjustments > levels)

  3. Then use the black color picker and click on the red area. It will change the light gray to black. You can change the black density or recipe by double clicking first on the black color picker first.

enter image description here

This is a non destructive method and it will also take care of the anti-aliasing.

If the white part of your graphic is actually transparent, you can also simply use a COLOR OVERLAY in the layer style (double click on your layer for options), and select black as color.

You'll be able to change that color as many time as you want and keep the original color too if you want to revert to it.

1/20/2016 5:20:00 PM

Go-Junta has a good generalized answer, but for this specific image:

  • open the channels palette
  • delete the red and green channels
  • set the image mode to greyscale
  • set the image mode the RGB again (optional)