How to make a logo single-colored?

Question

I'm trying to convert a bunch of company logos to one single color (not just black and white). It's for a website I'm working on, for the "We support those products" type of thing.

Here's what I'm starting with:

What I did so far:

1. Desaturate via Image -> Adjustments -> Desaturate
2. Convert to grayscale via Image -> Mode -> Grayscale
3. Convert to Monotone via Image -> Mode -> Duotone, then select Monotone and my color
4. Make the background transparent with the magic wand tool

Here's where I'm at now:

The thing that I'm not happy about is that there are still multiple shades of blue there. I want it to be just one single color on transparent background. Just one shade of blue (or whatever color I pick).

Answer 1

Add a 'Threshold' adjustment layer on top. You'll find it in he layers palette:

This will cause you to lose all anti-aliasing, though, for the layer reduces all variance and allows only white and your chosen monotone colour.

edit:

If you want to keep the anti-aliasing and don't mind fine-tuning settings for each image, you'd be better off with a curves layer instead. I had some succes with your example using a curve like this one:

Answer 2

The fastes method (which may even be scriptable for batch conversion) I can think of to make a simple logo monochrome is using the bucket fill tool:

1. Select background by color.

2. Make background transparent.

3. Invert selection:

   

4. Fill with desired color:

   

Better results may be obtained by tracing the image to vector and then apply one single object color.

Answer 3

Try using a color overlay via the layer options.