I need to determine whether a selected UIColor (picked by the user) is dark or bright, so I can change the color of a line of text that sits on top of that color, for better readability.
Here's an example in Flash/Actionscript (with demo):
http://web.archive.org/web/20100102024448/http://theflashblog.com/?p=173
Any thoughts?
Cheers,
Andre
UPDATE
Thanks to everyone's suggestions, here's the working code:
- (void) updateColor:(UIColor *) newColor
{
const CGFloat *componentColors = CGColorGetComponents(newColor.CGColor);
CGFloat colorBrightness = ((componentColors[0] * 299) + (componentColors[1] * 587) + (componentColors[2] * 114)) / 1000;
if (colorBrightness < 0.5)
{
NSLog(@"my color is dark");
}
else
{
NSLog(@"my color is light");
}
}
Thanks once again :)
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