iphone text message colours

i am working开发者_JAVA百科 on a messaging application for iphone , can anyone tell me how to achieve the green color for the messages received like in the image shown below

Those are custom views with custom images. Easiest way is probably to draw the bubble in the smallest way possible and use -[UIImage stretchableImageWithLeftCapWidth:topCapHeight:] to create a stretchable image and draw that in your custom view as background.

I think that green color bubble is an Image.