ios - Change button background color using swift language -

ios - Change button background color using swift language -

i new swift language. can tell me how alter background color of button using swift language?

button.backgroundcolor = uicolor.bluecolor()

or other color: redcolor(), greencolor(), yellowcolor() ,etc.

another alternative rgba color:

button.backgroundcolor = uicolor(red: 0.4, green: 1.0, blue: 0.2, alpha: 0.5)

ios iphone colors uibutton swift