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Altering colors Rick Mann Wed Jul 21 19:00:34 2010

In an app I'm currently working on, our designers have created a number of 
gradients based on a basic source color (i.e. a shade of blue or yellow). 
They've specified the start and end color of each gradient, making for a lot of 
colors to parameterize in the app.

It occurs to me that I ought to be able to get close to their colors by using a 
single color, and then applying a series of mathematical transforms on it. Are 
there operations on CGColorRef to make it more or less saturated, and more or 
less bright?

Is there a way to take two colors and determine the operation that would 
convert one to the other?



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