Möglicherweise ist die Schriftfarbe etwas zu dunkel eingestellt.
Hier mal ein Auszug eines anderen Themes, in dem die Zuordnung etwas erklärt wird,
damit du nicht ganz im Dunkeln tappst.
fg[NORMAL] = "#555555" # light blue
fg[PRELIGHT] = "#555555" # text on buttons (hover)
fg[ACTIVE] = "#555555" # text on unfocused tabs
fg[SELECTED] = "#ffffff" # selected text on lists
fg[INSENSITIVE] = "#b1b1b1" # greyed "unused" text
bg[NORMAL] = "#f6f6f6" # entire background
bg[PRELIGHT] = "#f6f7f8" # button prelights
bg[ACTIVE] = "#e5e6e7" # selected taskbar items
bg[SELECTED] = "#C7D0D1" # menu selected background
bg[INSENSITIVE] = "#fefefe" # greyed buttons
base[NORMAL] = "#f6f6f6" # window background
base[PRELIGHT] = "#f6f6f6" # menubar outline colour
base[ACTIVE] = "#C7D0D1" # selected item background (out of focus)
base[SELECTED] = "#C7D0D1" # selected hilight,tab/slider background, & menu stripe
base[INSENSITIVE] = "#e0e0e0" # greyed sliders
text[NORMAL] = "#555555" # text in general
text[PRELIGHT] = "#555555" # hover text (on buttons)
text[ACTIVE] = "#555555" # greyed text out of use (on highlight)
text[SELECTED] = "#555555" # selected text (on highlight)
text[INSENSITIVE] = "#b1b1b1" # greyed text
Jean-Paul