If you have a colour with transparency (208 in your case) the colour that was there before will have an effect on your red, in your case a white was in the background first so the red will be slightly mixed with white, thus making the pink you see. If you had the colour on a black background, the red would look darker.
Thanks. Julian. My confusion comes from the image below which has transparency in it. I like the translucent and will probably use that instead. I do not remember a setting for getting an image with translucent