Search in "locale/de/ui/inventorywindow.py" for:
Code:
{
"name" : "Money",
"type" : "text",
"x" : 3,
"y" : 3,
"horizontal_align" : "right",
"text_horizontal_align" : "right",
"text" : "123456789",
},
and add a new line with:
Code:
"color" : 0xffRRGGBB;
RR for red component, GG for green and BB for blue.