UIColor+ContrastingColor 0.0.1

UIColor+ContrastingColor 0.0.1

TestsTested
LangLanguage Obj-CObjective C
License MIT
ReleasedLast Release Dec 2014

Maintained by Paul Williamson.




UIColor+ContrastColor

Returns either black or white based on the contrast against the current colour.

There are currently two options for determining which colour to use: the 50% method, or the YIQ method.

The 50% method

The self colour is converted to hex then checked if it is >= 0x808080. If the colour is >= 0x808080 then black colour is returned, otherwise white colour is returned.

The YIQ method

The YIQ method is arguably better as it applies weighting to the colours, which could result in better contrast matches.

Screenshot

Using the category

Using CocoaPods, add the following to your Podfile

pod `UIColor+ContrastColor`

Alternatively, just drag the contents of the Classes folder into your project.

Then import the header and call the method:

UIColor *redColor = [UIColor redColor];
UIColor *textColor = [redColor sqf_contrastingColorWithMethod:SQFContrastingColorYIQMethod];

Credits

This category was inspired by a blog post by Brian Suda. If you haven't read it, I highly recommend you go take a look at the original article for more depth.