Trouble with tinting/colorizing an image..

[pezz]

Greetings all!

I have an image I wish to tint/colorize towards a blueish colour, however I cannot seem to produce the desired result by using colorizeImage.
I've also tried with various other functions, for instance tintImage, but nothing seems to work for me..
So I'm hoping a kind soul here might be able to help me in the right direction

!example.png (17.24 KiB) Viewed 4876 times

The line of code I've used to produce the above result was:

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$im->colorizeImage('rgb(0,0,255)',1);

I basically want to be able to do the following command inside php (without exec):

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convert test.png -fill blue -colorize 100%   colorize_shape.png

(From http://www.imagemagick.org/Usage/color/#colorize).