Set RGB value for label text

Question

I am having the color codes as R:38 G:171 B:228 , but when I set the values as .38f in the color with Red : Green : Blue:, I am unable to get the desired color:

[CategoryLbl setTextColor:[UIColor colorWithRed:.38f green:.171f blue:.226f alpha:1.0f]];

Please help.

Answer 1

You're mixing up two scales: UIColour looks like it uses floating point values 0-1 whereas the usual RGB values are 0-255. Instead you want

 38 / 255 = 0.1491f
171 / 255 = 0.6706f
226 / 255 = 0.8863f

so

[CategoryLbl setTextColor:[UIColor colorWithRed:0.1491f green:0.6706f blue:0.8863f alpha:1.0f]];

There may be better ways to do this, e.g. using the 0-255 values - I don't know OSX / iPhone development well.

Actually it looks like you can just do:

[CategoryLbl setTextColor:[UIColor colorWithRed:(38/255.f) green:(171/255.f) blue:(226/255.f) alpha:1.0f]];

which is easier to understand (although I gave you enough d.p. the first one should be as accurate).