Update app.py

app.py

@@ -11,7 +11,7 @@ def func(percent, numBlocks):
     return HTMLstr
     
 
-css_adds = ".tooltiptext {visibility: hidden;max-width:100ch;min-width:60ch;top: 100%;left: 50%;background-color: black;color: white;text-align: center;border-radius: 6px;padding: 5px 0;position: absolute;z-index: 1;} \
+css_adds = ".tooltiptext {visibility: hidden;max-width:100ch;min-width:60ch;top: 100%;left: 50%;text-align: center;border-radius: 6px;padding: 5px 0;position: absolute;z-index: 1;} \
 #filled:hover .tooltiptext {visibility: visible;} \
 #empty:hover .tooltiptext {visibility: visible;}"