Auto-name materials in Blender

import bpy
import colorsys

# Define the category names
hue_categories = ["Red", "Yellow", "Green", "Cyan", "Blue", "Purple"]
saturation_categories = ["Pale", "Normal", "Vibrant"]
value_categories = ["Dark", "Normal", "Light"]  # <-- Reverse the order of the value categories

# Iterate over all selected objects
for obj in bpy.context.selected_objects:
    # Iterate over all materials assigned to the object
    for mat in obj.data.materials:
       # Get the base color of the material
        base_color = mat.diffuse_color

        # Convert the base color's RGB values to HSV values
        h, s, v = colorsys.rgb_to_hsv(base_color[0], base_color[1], base_color[2])

        # Calculate the hue category
        hue_index = int((h+1/6)*5)
        hue_category = hue_categories[hue_index]

        # Calculate the saturation category
        if s < 0.33:
            saturation_category = saturation_categories[0]
        elif s < 0.66:
            saturation_category = saturation_categories[1]
        else:
            saturation_category = saturation_categories[2]

        # Calculate the value category
        if v < 0.33:
            value_category = value_categories[0]
        elif v < 0.66:
            value_category = value_categories[1]
        else:
            value_category = value_categories[2]

        # Set the name of the material to the combination of categories
        mat.name = hue_category + " " + saturation_category + " " + value_category