Fixed color picker issue (ensured HEX format & RGBA conversion)

app.py

@@ -1,14 +1,18 @@
 import numpy as np
 import matplotlib.pyplot as plt
 import gradio as gr
+import matplotlib.colors as mcolors
 import os  
 
 def plot_function(func_str, x_min, x_max, resolution, color, linestyle, grid):
     try:
-        # Ensure color is valid (fallback to black if empty)
-        if not color:
+        # Ensure color is in proper HEX format
+        if not color or not color.startswith("#") or len(color) != 7:
             color = "#000000"  # Default to black
 
+        # Convert to Matplotlib-compatible RGBA format
+        color = mcolors.to_rgba(color)  
+
         x_values = np.linspace(x_min, x_max, resolution)
         functions = func_str.split(",")
 
@@ -19,7 +23,7 @@ def plot_function(func_str, x_min, x_max, resolution, color, linestyle, grid):
             func = lambda x: eval(func_text, {"x": x, "np": np})
             y_values = func(x_values)
 
-            # Use HEX color directly without conversion
+            # Use RGBA color format (Matplotlib-compatible)
             plt.plot(x_values, y_values, label=f"f(x) = {func_text}", color=color, linestyle=linestyle)
 
         plt.xlabel("x")
@@ -29,7 +33,7 @@ def plot_function(func_str, x_min, x_max, resolution, color, linestyle, grid):
         if grid:
             plt.grid()
 
-        # Save the plot correctly and return an absolute path
+        # Save the plot and return absolute path
         plot_filename = "high_res_plot.png"
         abs_path = os.path.abspath(plot_filename)  # Convert to absolute path
         plt.savefig(abs_path, dpi=300)