Why do I get this error while trying to create a color?

float red = .5F; Color32 temp = new Color32(red, 0, 0, 0); The best overloaded method match for `UnityEngine.Color32.Color32(byte, byte, byte, byte)' has some invalid arguments Argument `#1' cannot convert `float' expression to type `byte' from what i see in the documentation, I should be able to pass in a float as an argument of a new color... http://docs.unity3d.com/Documentation/ScriptReference/Color32-ctor.html