Update utils.py

utils.py

@@ -12,6 +12,7 @@ import io
 import random
 import datetime as dt
 import copy
+import cv2
 
 import numpy as np
 import pandas as pd
@@ -38,6 +39,30 @@ TRANSPARENT_BG = dict(
 # Speaker sample helpers
 # ---------------------------------------------------------------------------
 
+def colorsCSS(n, startingHue=None):
+    """Creates n distinctive CSS hex colors evenly spaced across the hue wheel.
+
+    Drop-in replacement for su.colorsCSS that accepts an optional startingHue
+    so related color pools (catTypeColors, speakerColors, catColors) can share
+    the same starting point and stay visually consistent across rerenders.
+    """
+    if n == 0:
+        return []
+    ret = []
+    h = startingHue if startingHue is not None else int(random.random() * 180)
+    step = 180 / n
+    for _ in range(n):
+        h += step
+        h = int(h) % 180
+        hsv = np.uint8([[[h, 200, 200]]])
+        bgr = cv2.cvtColor(hsv, cv2.COLOR_HSV2BGR)
+        b = f'{bgr[0][0][0].item():02x}'
+        g = f'{bgr[0][0][1].item():02x}'
+        r = f'{bgr[0][0][2].item():02x}'
+        ret.append('#' + b + g + r)
+    return ret
+
+
 def extract_clip_bytes(waveform, sample_rate, seg_start, seg_end):
     """Return WAV bytes for the loudest SAMPLE_MIN–SAMPLE_MAX window in [seg_start, seg_end]."""
     total_samples = waveform.shape[-1]