USESCALE with no color?

Support
#1

I’m trying to set up Icon swap based on fping but with no color changes to the LABEL.
There is no SCALE min max tagtext and if I add colors to the SCALE they over rule LABELBGCOLOR none.
Is there a transparent color I can use or a way I can adjust the SCALE so the colors are not mixed in?

My config:

SCALE UPDOWN   0    0.1   255 0 0	up 
SCALE UPDOWN   0.1  0.99  0 255 0   recovering
SCALE UPDOWN   0.99 100   0 0 255   down

NODE DEFAULT
        LABELOUTLINECOLOR none
        LABELBGCOLOR none
        USESCALE UPDOWN

NODE 1
        LABEL TEST
        LABELOUTLINECOLOR none
        LABELBGCOLOR none
        USESCALE UPDOWN
        ICON images/router_{node:this:inscaletag}.png
        TARGET fping:11.11.11.11