add range slider component

src/util/color.py

@@ -0,0 +1,18 @@
+import re
+
+from PySide6.QtGui import QColor
+
+
+def is_hex_color(color: str):
+    return re.match("[0-9a-f]{6}", color, flags=re.IGNORECASE)
+
+
+def to_qcolor(color: str):
+    if is_hex_color(color):
+        red = int(color[0:2], 16)
+        green = int(color[2:4], 16)
+        blue = int(color[4:6], 16)
+        return QColor(red, green, blue)
+    elif color in QColor().colorNames():
+        return QColor(color)
+    return QColor(255, 255, 255)