How to get RGB components of a custom color in ios

Question

I would like to set custom color programmatically using the method
[UIColor colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha];
For which i need to know the value of RBG components.
I would like to know is there any way by which i can get the RBG components of a custom color so that i can use them in the above mentioned method.

Answer 1

You can use the DigitalColor Meter.app included with every Mac OS X install. You can find it in ~/Applications/Utilities/DigitalColor Meter.app. Use it to inspect the RGB values of any pixel you mouse over. Once you have the values, you just need to divide them by 255.0 because +colorWithRed:green:blue:alpha: is expecting a floating point value between 0 and 1.

[UIColor colorWithRed:83.0f/255.0f green:217.0f/255.0f blue:58.0f/255.0f alpha:1.0f];

Answer 2

You can use Xcode itself to get RGB value of custom color:

Click the arrow for the Color box and in the resulting dialog box choose others.

And then you can use RGB Slider option to get RGB values