[TYPO3-english] GIFBUILDER headings change on different content-element layout

[Enrique Moreno Tent]

Hello guys. Im writing my headings with GIFBUILDER like this, so they look
nice and white:

lib.stdheader.10 = IMAGE
lib.stdheader.10{
    titleText.field = header
    altText.field = header
    fontTag >
    file = GIFBUILDER
    file {
        XY = [10.w]+5,[10.h]+10
        backColor = #EAEAEA
        10 = TEXT
        10{
            text.field = header
            offset = -2,20
            align = center
            niceText = 1
            fontColor = #ffffff
            fontFile = fileadmin/templates/web/fonts/ClanOT-Medium.otf
            fontSize = 18

        }
        format = png
        backColor = #aec924
        transparentBackground = 1
        transparentColor = #aec924
        transparentColor.closest=1
    }
}

But now I've gone and defined a new  content-element layout, whitebox:

TCEFORM.tt_content.header_layout{
    altLabels {
      2 = white Box
      1 = green Box
      0 = Normal
    }
}

and I want the Heading to have a black color, when the layout is white
box.... How can I do this? :S