Invert label color in some colors.

[NikKovIos]

In some light colors like yellow - white label looks bad. What about inverting color to black in such matters?

[bachonk]

The random color generation is designed in such a way that it tries to prevent making bright background colors, but it could be improved.

Another solution is to roll your own color generation, and use the method:
- (void)setImageWithString:(NSString *)string color:(UIColor *)color circular:(BOOL)isCircular textAttributes:(NSDictionary *)textAttribute

Using that function, you can set color to a yellow color, and set the text color in textAttribute to black.

[NikKovIos]

I have updated code with contrast ability. You can close an issue.

With contrast.zip