Setting gui image color

[Gravestone]

I recently tried to set a GUI static image's color using guiSetProperty. First I didn't know which property to use so I used GUI Editor, created an image and set it's color to green. This is what the code looked like:

        guiSetProperty(GUIEditor.staticimage[1], "ImageColours", "tl:FF00FF00 tr:FF00FF00 bl:FF00FF00 br:FF00FF00")

Now if I have to set the image's color to specific RGB values, how do I figure out what the code should look like matching this "tl:FF00FF00 tr:FF00FF00 bl:FF00FF00 br:FF00FF00". I hope you guys understand.

[Simple0x47]

The property has four sections. Top Left, Top Right, Bottom Left, Bottom Right. Each of them uses a HEX code which follows a RGBA structure. FF(Red)00(Green)FF(Blue)00(Alpha). So just get a normal RGB hex code and add to it at the end FF for 100% Alpha or 00 for 0% Alpha.