sharper transition

app.py

@@ -287,6 +287,7 @@ def _merge_style(old_style: str, updates: dict) -> str:
 def get_gradient_color(confidence: float, threshold: float) -> str:
     """
     Generate a gradient color from dark to bright green based on confidence.
+    Uses a power function for sharper contrast.
     
     Args:
         confidence: Probability score (0-1)
@@ -299,9 +300,12 @@ def get_gradient_color(confidence: float, threshold: float) -> str:
         return "#101418"  # base color (no prediction)
     
     # Normalize confidence to [0, 1] range starting from threshold
-    # This ensures threshold maps to darkest green, 1.0 maps to brightest
     normalized = (confidence - threshold) / (1.0 - threshold)
     
+    # Apply power function for sharper gradient (higher power = sharper)
+    # You can adjust the exponent: 2.0 = moderate sharp, 3.0 = very sharp
+    normalized = normalized ** 2.5
+    
     # Define gradient from dark green to bright green
     # Dark green: #1a5e3a, Bright green: #2ecc71
     r_start, g_start, b_start = 0x1a, 0x5e, 0x3a  # dark green